Fatal error: Exception thrown without a stack frame in Unknown on line 0

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Ok, I have run into a rather strange problem ..
I need to move a website from one server to another. I export my database and move my files to the new server.

So I get this error message:
Fatal error: Exception thrown without a stack frame in Unknown on line 0


Then I tried to run a database migration which did not help.

1.System and setting -> datebase backup -> run back
2 database migration -> run migration on backup - download and then import to the new server.

Then I tried to run the manual script and here I get this error:
# 1017 - Can not find file: '. / Database / permissionassignments.frm' (errno: 2)


does anyone have a suggestion how to proceed from here?

The website running the latest version of c5.