Just getting back around to the wallet.
This is the error I get after tryomg to logi in.
"Couldn't open wallet: basic_string::_M_replace-aux"
Even trying to use the seed doesn't work.
I googled your error message and this response from dEBRUYNE_1 in the monero subreddit could fix your issue. Essentially, backup and/or rename your wallet cache file and it'll rebuild and hopefully fix your problem.
https://www.reddit.com/r/Monero/comments/5yi6fo/error_when_trying_to_use_password_for_gui_wallet/Thanks.
Will give it a shot.