1Password

Without any more detail, I would say it's a 1Password issue.

I use Roboform as my password manager and it works fine on this site and many others.

Is the issue with a desktop or mobile device?

Are the passwords kept locally on each device or on line and synced to your devices?

Answers may help others solve your problem, but sorry, I have no experience with 1Password.

EDIT: Also, different parts of the EO system that require logon may need separate entries in your password manager. Depends on the page that's asking for info and how the password manager handles that.

I use Apple password manager and iCloud never had a problem, my sister took 2000 photos on a trip to the U S on a iPhone 11 came home downloaded them on to a computer and lost the stick ,2 years later she found it and the photos i said why did you do that ,she said i don't trust the cloud.

I have 220 logins stored in 1passwword 7 and exploroz is the only one that has suddenly stopped working.
My hard copies are in a safe and not readily at hand. If hard copies are in a drawer etc that book will go in the pocket of a thief who will then have access to banking and other investment details.

All good now, hold down control, option then quit 1password altogether and restart computer.
Thank you all