Hello. I just tried upgrading my site from J3 to J4 and I get this error message : Class 'JString' not found. This is the site : [secret]
veyron.temp.domains/~pad/administrator/
[/secret]
Any idea what is causing this. Site is not visible anymore and limited functionalities on the backend. I used your video to proceed to the upgrade from J3 to J4.
This is happening on the administrative backend. Anywhere you click Admin panel this error is there. On the frontend site is not showing up. I can create you an admin account if you want to check this issue.