Long time no see
I hope you are doing well?
I am trying to upgrade the Joomla websites to 4. I followed the migration process steps quite precisely. The pre update survey is not completely 'green', however, there are no labels that say 'could cause an issue' anymore.
So... I dared to make the jump. After the green bar reaches its end, the backend gets broken and I see these 2 errors (attached) on the frontend.
I have been trying to solve this for many hours, and I do find some topics about these errors however they don't bring me any further.
Do you have any idea, what could cause this?
With kind regards!