I recently reactivated my acccount and changed my password.
Some digging in the Fog ...
Could it be that you are using Special Characters
at the beginning of your changed Password.
https://owasp.org/www-community/password-special-characters
This does not work with the current stable Version which is
1.2.334, but it is fixed in the recent Beta Version.
https://www.istripper.com/forum/thread/50577/1?post=737629
FIX : Password error text translation
In that case reset your Password again,
https://www.istripper.com/resetPassword
and avoid using those Characters at the beginning of it.