Appreciate all the help.
I want to describe the problem I'm having (maybe I should post as a new post) since it happened today, on freshly created notes, all in Evernote v10, on my work computer.
I had a Powerpoint presentation on my personal Dropbox that I need to take to work (kids stuff calendar so I can mark my work calendar). On my phone, from Dropbox, I shared it to my gmail, and E-mailed it to Evernote. I opened it in Evernote on my work computer, and it said it was unreadable and then deleted the attachment from the note. Instead, I opened up my E-mail and got it from there. I tried sending it again and tried to save it from Evernote onto my computer, but that didn't work.
My wife also had something she wanted me to print. I had her put it in her Evernote 10, and share it with me in Evernote; 6 PDF files. I opened them up on my work computer, and it says it can't read any of them as it says "Couldn't display this PDF File". It won't let me save it the computer either.
However, luckily the problem I posted about last week was temporary. I reinstalled Evernote 6.25 on my work and I was able to login. I pulled up the notes and the PDFs came right in.
I posted about this 2 years ago, Nov 2021, and submitted a service ticket with the old EN management, and never heard anything.
https://discussion.evernote.com/forums/topic/139962-pdfs-say-couldnt-display-this-pdf-file-on-my-work-computer-only/