@Bök342490180ph1
The first alert says the file is an Acrobat PDF file. Have you tried opening it in Acrobat?
Did you send the file to the email in the second alert?
Adobe is on company holiday until January 2, which is why you are not hearing from them now. And today is Christmas Day.
I've moved your post from Using the Community (for forum questions) to Adobe Illustrator.
Jane