almost the same problem here. I tried to even reset to a 4 letter password, it still says, that the credentials are invalid… When I enter the password in the plug-in, it just shows 4 dots (so I guess, it just saves 4 characters?). I even tried to delete and reinstall the plug-in, unfortunately, it seems the plug-ins seems not to delete fully and saves some stuff (including password). It even says, that there occurred an error during installation. Would be great to have a workaround….