Error after switch to branch 15.42

hello community
i have got this error after switching from develop to branch v15 any help ??

Hey guy, I did the same today and didn’t notice any error.

When does this error trigger?

Did you get any warnings / errors during downgrade?

When changing branch, try not to make a mistake and switch branch on an impossible app, do it only on those you are sure that you can.

Actually, I tried to update just now on another CT, I also get the same error now.

I just restart the VM and it worked