In a bit of a Pickle with Luks

I have my backup drive causing me issue. Its an external usb drive 4TB encrypted with Luks.
I have no issue per se, but my password not being recognized when trying to decrytpe the drive. To be precise, I have not forgotten my password. The password is not being recognized since I moved to arch KDE.
I was on Ubuntu before.
Is there is any possibility from the context explain above, to decrypt the drive ?