Multiple Upgrade Problems

[Cathus3]

I'm having loads of issues upgrading.

I tried upgrading 1.2.16 to 1.30. It ran and then I couldn't access website or admin, just got a blank page. As I couldn't access admin, I couldn't do a restore from the backup.

After hours of trying I decided to just delete the site, load 1.4.0 and then import my php database backup. It was too large to upload so I've spent all day loading individual tables.

Lots of issues now but here are two. My layouts have suddenly disappeared. All page templates appear in the screen grab. The Novator template appears to be missing though it is referenced in my php layouts table

I can't turn blocks on and off, the blue ON switch is kind of greyed and when I mouseover it a red NO ENTRY sign pops up.

I may have overwritten some new 1.4.0 tables when importing my old website tables

what is the best way to get my site working again, preferably with 1.4.0 or should  just delete everything and load a 1.2.16 site which worked fine?

[Cathus3]

screenshots re above

[Basara]

Hello.
When a blank page occurs, you should still be able to see the errors in your AbanteCart error log file. You can view this log file (/system/logs/error.txt) or server error log via your hosting panel's file manager, which will help you identify the issue. The most common causes are outdated extensions, custom code or an incompatible PHP version.

Additionally, please note that your 1.2.16 database will not work with the 1.4.0 code.

[smithcohn12]

It sounds like your database structure got corrupted during the import; I'd recommend doing a clean 1.4.0 install, then only import essential content tables from your 1.2.16 backup to avoid overwriting core 1.4.0 schema.

[Allan Scoot]

I'm having loads of issues upgrading.

I tried upgrading 1.2.16 to 1.30. It ran and then I couldn't access website or admin, just got a blank page. As I couldn't access admin, I couldn't do a restore from the backup.

After hours of trying I decided to just delete the site, load 1.4.0 and then import my php database backup. It was too large to upload so I've spent all day loading individual tables.

Lots of issues now but here are two. My layouts have suddenly disappeared. All page templates appear in the screen grab. The Novator template appears to be missing though it is referenced in my php layouts table

I can't turn blocks on and off, the blue ON switch is kind of greyed and when I mouseover it a red NO ENTRY sign pops up.

I may have overwritten some new 1.4.0 tables when importing my old website tables

what is the best way to get my site working again, preferably with 1.4.0 or should  just delete everything and load a 1.2.16 site which worked fine? connections unlimited

Given the severity and breadth of issues encountered after a direct database import from 1.2.16 into a 1.4.0 installation, the primary challenge is likely database schema and data integrity. Overwriting new 1.4.0 tables with older 1.2.16 structures will almost certainly lead to inconsistencies that manifest as missing layouts and dysfunctional UI elements. To diagnose the layouts, verify the `template` and `layout` table structures against a clean 1.4.0 installation and ensure all necessary entries exist and reference valid file paths on the filesystem. For the block toggles, check your server's PHP error logs, the browser's developer console for JavaScript errors, and confirm that the user account attempting to modify blocks has the correct permissions within the 1.4.0 system, as this UI behavior often indicates a backend validation or permission failure.