Server error password has to be re-entered

I am using version 9.1.2109 and in the last few days I have noticed it frequently gives a server error message that the password needs to be entered or re-entered (I forgot which). The password is showing even though it says this. I clear it and then enter the same password and things work fine until later in the day when I come back to my computer and it’s giving the error message again. I’m wondering if it’s this new version since it seems I just updated it recently. Help!