Hope you are doing well and sorry for the trouble. As described you are unable to print the PDFs
Is this a behavior with a particular PDF file or with all the PDFs? Please try with a different PDF file and check. If the file is stored on a shared network/drive, please download it to your computer first and then try to print and check.
Also make sure you have the recent version 21.07.20099 of Acrobat Reader DC installed. Go to Help > Check for updates and reboot the computer once.
If it still doens't work , please try to turn off the protected mode for testing. Go to Edit (Win), Adobe Acrobat (Mac) > Preferences > Enhanced Security and uncheck 'Enable protected mode at startup' > Click OK and reboot the computer.
Note: Please turn on the security after testing to avoid any security risk.