Domain password change breaks shared review access

Hello.

This is long and tangled, forgive me.

My work domain requires periodic password changes. Before the latest required password change, I had a shared review going on a SharePoint server that I could get into with ease. After that password change, I can open existing shared review files but I cannot check for new comments or post new responses. I get error messages that all mention that my login credentials are expired or invalid. (See attached PDF of the screenshots.)

One other weird thing is that I get a popup inside Acrobat that says that my browser needs to be upgraded. I pressed the update button and it fooled around with Microsoft Edge. Despite this browser upgrade, I still get that nag screen when I first open a shared review file and also when I try to check for new comments.

Just for grins, I setup a new shared review using a new PDF. Everything went perfectly smoothly: the shared review file and the shared review folder were both created on the SharePoint. However, I cannot post new comments to this new review for the same reasons I mentioned above.

As you might imagine, this is a critical problem and so I'll appreciate any input and suggestions.

Thanks in advance,

Bill