So I did the updagrade today from version 17 to the latest available stable version --> https://tiki.org/Download and I remove the older files from the server and uploaded the new package. I did take a copy og the img folder and incorporated that into the new pacakge + the /db/local.php. I ran the installer which reported that I needed to set php to 7.1 (which I did of course), I then continued the upgrade with seemed to run fine and did not give me any errors. After that I locked the install and boom (!), this message shows up and is displayed:
I attempted to run the install/upgrade wizard and this time it reported that there was some encoding issues with the database and that it could fix that. So i ran the fix and the wizard reported that it went well and now I had "green lights". I ran the upgrade again hopefully that this would solve the issue, but to no avail, same error pops up after locking and attempting to load the front-page:
So now I have no idea what to do. The error message doesn't really tell you anything..
Any of you guys here that have an idea on how to fix this?
Thanks a lot in advance!