Game can't save due to System.ExecutionEngineException

Game is working OK, except that fact that I can’t save any of my progress. This is the log game show me. https://pastebin.com/b9ugW5bU

Ah, yes, this error System.ExecutionEngineException: String conversion error: Illegal byte sequence encounted in the input as far as I know is caused by your operating system username containing “weird” characters in non-utf8 encoding. I think that because a person who reported this before said that their username used Cyrillic characters on Windows.

There is an open issue for this:

To me this looks like a bug in the mono runtime, but I haven’t been able to find a bug report about this to them. So someone should bite the bullet and try to contact the mono developers to ask about this.

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