I’m trying to upgrade a sandbox of my production instance, which is running 7.8.3. I’ve tried both doing the upgrade in stages, and the 7.8.x-7.10.7 upgrade. In each instance the installation completes and loads correctly, but then the system is completely unusable because of what you see in the attached image.
The left side of the screen appears to list all modules and on the right side of the screen you see the + which when clicked creates a new record for that module. Since this is “overlaying” the screen - nothing below the top menu is clickable or usable. You can navigate from the top menu, but the “overlay” stays the same.
I’ve tried repair/rebuild (by copying the URL from my production system to get to it, since the admin menu isn’t clickable because of the “overlay”) I’ve deleted the cache folders and forced a rebuild, i’ve cleared my browser cache, and i think i’ve about exhausted my abilities in this matter.
Anyone have any suggestions on how to correct this?
Running on windows 2008 R2, IIS, PHP 7.0.18. & MSSQL 2008 - not that it should make a difference.