I found a fix. the plutonium client is the same one as the one on the website but if you redownload it, it just fixes.

RealTrix
@RealTrix
Posts
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Not letting me log in -
Not letting me log inI decided to hop on for the first time in a while to see that I get an error every time I try to log in, I knew it wasn't the wrong username or password because I logged onto the forums. someone pls help.