Buonasera,
ho installato la versione 2.4.12 su server differente da quello utilizzato con su la 2.4.10 per verificare il funzionamento prima di eseguire l'upgrade.

dopo l'installazione ho ripristinato il backup del server con la 2.4.10, ma dopo il ripristino chiede l'aggiornamento e si blocca al 73%, facendo il refresh della pagina mi dice: E' attualmente in corso la procedura di aggiornamento del software, e pertanto siete pregati di attendere fino alla sua conclusione.
Nel caso il problema persista, rivolgersi all'amministratore o all'assistenza ufficiale.

di seguito il contenuto il file log:

[2019-09-30 20:42:38] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"37.119.0.223","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=1","unique_id":"XZJMnfNykAPKgu9AXTtZIAAAAAA","uid":"989d97b"}
[2019-09-30 20:42:38] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('1')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"37.119.0.223","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=1","unique_id":"XZJMnfNykAPKgu9AXTtZIAAAAAA","uid":"989d97b"}
[2019-10-31 10:33:03] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"151.0.187.202","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=2","unique_id":"XbqqTSCthwoiPWTfc@tFnwAAAAI","uid":"94e1a7d"}
[2019-10-31 10:33:03] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('2')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"151.0.187.202","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=2","unique_id":"XbqqTSCthwoiPWTfc@tFnwAAAAI","uid":"94e1a7d"}
[2019-11-27 14:05:57] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"85.42.48.164","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=3","unique_id":"Xd50tEN3v8SpWwA2ySWfZgAAAAE","uid":"51f6a16"}
[2019-11-27 14:05:57] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('3')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"85.42.48.164","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=3","unique_id":"Xd50tEN3v8SpWwA2ySWfZgAAAAE","uid":"51f6a16"}
[2019-11-30 12:54:46] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"93.33.82.82","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=5","unique_id":"XeJYhsxUTBK5OaBhjm0QRwAAAAA","uid":"5e1d25a"}
[2019-11-30 12:54:46] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('5')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"93.33.82.82","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=5","unique_id":"XeJYhsxUTBK5OaBhjm0QRwAAAAA","uid":"5e1d25a"}
[2019-11-30 13:11:50] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"93.33.82.82","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=6","unique_id":"XeJchC3rIh7vHZDSBzuypgAAAAM","uid":"dd52727"}
[2019-11-30 13:11:50] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('6')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"93.33.82.82","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=6","unique_id":"XeJchC3rIh7vHZDSBzuypgAAAAM","uid":"dd52727"}
[2019-11-30 13:49:45] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"93.33.82.82","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=5","unique_id":"XeJlaXuWXy1bIryyEWiDHQAAAAU","uid":"0e247ac"}
[2019-11-30 13:49:45] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('5')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"93.33.82.82","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=5","unique_id":"XeJlaXuWXy1bIryyEWiDHQAAAAU","uid":"0e247ac"}
[2019-11-30 13:52:46] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"93.33.82.82","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=7","unique_id":"XeJmG8oRBc29JfmkCkI0tQAAAAE","uid":"7c96139"}
[2019-11-30 13:52:46] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('7')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"93.33.82.82","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=7","unique_id":"XeJmG8oRBc29JfmkCkI0tQAAAAE","uid":"7c96139"}
[2019-12-02 15:19:00] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"85.42.48.164","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=9","unique_id":"XeUdU3uvESeRl5wDtqOABAAAAAE","uid":"a5f5cf8"}
[2019-12-02 15:19:00] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('9')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"85.42.48.164","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=9","unique_id":"XeUdU3uvESeRl5wDtqOABAAAAAE","uid":"a5f5cf8"}
[2019-12-31 17:57:47] Logs.ERROR: Uncaught Exception Error: "Call to a member function calcola() on null" at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php line 325 {"exception":"[object] (Error(code: 0): Call to a member function calcola() on null at /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php:325)"}
{"url":"/erp/actions.php","ip":"82.53.199.243","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=12","unique_id":"Xgt@CvmWd@UILh5ywC5RXAAAAAQ","uid":"0cf0af9"}
[2019-12-31 17:57:47] Logs.ERROR: Call to a member function calcola() on null {"code":0,"message":"Call to a member function calcola() on null","file":"/web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php","line":325,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/src/Fattura.php(377): Modules\Fatture\Fattura->registraScadenzeTradizionali(false)\n#1 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/modutil.php(111): Modules\Fatture\Fattura->registraScadenze(false)\n#2 /web/htdocs/www.ibratech.it/home/erp/modules/fatture/actions.php(117): aggiungi_scadenza('12')\n#3 /web/htdocs/www.ibratech.it/home/erp/actions.php(183): include('/web/htdocs/www...')\n#4 {main}"}
{"url":"/erp/actions.php","ip":"82.53.199.243","http_method":"POST","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/editor.php?id_module=14&id_record=12","unique_id":"Xgt@CvmWd@UILh5ywC5RXAAAAAQ","uid":"0cf0af9"}
[2020-02-03 19:29:20] Logs.ERROR: Uncaught Exception Spipu\Html2Pdf\Exception\TableException: "The content of the TD tag does not fit on only one page" at /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php line 5668 {"exception":"[object] (Spipu\Html2Pdf\Exception\TableException(code: 4): The content of the TD tag does not fit on only one page at /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php:5668)"}
{"url":"/erp/pdfgen.php?ptype=riepilogo_interventi&id_module=3","ip":"79.34.234.142","http_method":"GET","server":"www.ibratech.it","referrer":"https://www.ibratech.it/erp/controller.php?id_module=3","unique_id":"Xjhmf5RV0MOpc0kC-2Xo5AAAAAA","uid":"ee03161"}
[2020-02-03 19:29:20] Logs.ERROR: The content of the TD tag does not fit on only one page {"code":4,"message":"The content of the TD tag does not fit on only one page","file":"/web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php","line":5668,"trace":"#0 /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php(1439): Spipu\Html2Pdf\Html2Pdf->tag_close_TD(Array)\n#1 /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php(1393): Spipu\Html2Pdf\Html2Pdf->executeAction(Object(Spipu\Html2Pdf\Parsing\Node))\n#2 /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php(961): Spipu\Html2Pdf\Html2Pdf->makeHTMLcode()\n#3 /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php(2806): Spipu\Html2Pdf\Html2Pdf->setPageHeader()\n#4 /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php(1439): Spipu\Html2Pdf\Html2Pdf->tag_open_PAGE_HEADER(Array)\n#5 /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php(1407): Spipu\Html2Pdf\Html2Pdf->executeAction(Object(Spipu\Html2Pdf\Parsing\Node))\n#6 /web/htdocs/www.ibratech.it/home/erp/vendor/spipu/html2pdf/src/Html2Pdf.php(595): Spipu\Html2Pdf\Html2Pdf->_makeHTMLcode()\n#7 /web/htdocs/www.ibratech.it/home/erp/src/Prints.php(352): Spipu\Html2Pdf\Html2Pdf->writeHTML('\n\n\n\n\n\n\n\n\n\n\n\n\n\n