Can't combine PDF's since Monterey update
I am a real estate agent and combine pdf documents on a regular basis. Since the upgrade I am unable to combine pdf's. I get the following message: "Without the owner password, you do not have permission to insert, delete, or rotate pages of the document." When I hit the cancel button nothing happens. When I hit the unlock button nothing happens. I have to restart my computer to get it working again or use force quit. These are my documents and DO NOT HAVE PASSWORDS! I was on the phone with support for most of the day today, running through it with two different people! They even had me re-install the update. Nobody can help me. Any suggestions?
MacBook Pro 13″, macOS 12.3