I'm having the same unexpected error (17) problem too. It started after the 5.3 patch. I tried reinstalling the game (deleted the game files at the documents too) and it worked for a while. Now I'm stucked at doman enclave I can't even log on to my character it just crashes the moment I log it in.

Edit: Just wanna add that this is the 3rd time I reinstalled the game too.