My password is not accepted because it is too long
In password security, the longer the better. With a password manager, using more than 24 characters is simple. Unless, of course, the secure password is not accepted due to its length. (In this case, through STOVE.)
Possibly indicating cleartext storage of a limited field (which is an absolute no-go), or suboptimal or lacking security practices.
When I banked with wells fucking fargo they had issues similar to this. I had something like a 16 character password and I once forgot the last character and it accepted it anyway, so there was some kind of character limit that they didn't make obvious.
I also had a time I accidentally had caps lock on, and my password still was accepted. Their passwords were not case sensitive even though their password screen says they were.