Error while exporting

[micheus]

Is It posieble that texture with russian signs could cause issue?

Yes.
Looking better to the message, it was when writing a text to the file. That '~s ~s' means two strings to be written. As for unicode output available recently, I think it should be replaced by '~ts ~ts':
'(...) The meaning of the modifier should be such that e.g. the formatting control "~ts" means a string in Unicode while "~s" means means a string in iso-latin-1. (...)' (from Formatting functions in this article).

To test if that fix the issue without a side effect still requires a problematic file.