I am not able to open any PDF directly either.
To be specific when I launch acrobat I get the sign in prompt and closing it also closes acrobat. The version is Adobe Acrobat Pro DC 2020 windows continuous release v2020.009.20067.
Even then I am not able to activate acrobat. I tried uninstalling, deleting all the left over files, including those in appdata, restarting the PC and reinstalling from the offline installer from helpx. I tried to activate it using painter patcher but it failed. Hi guys, I just recently had adobe acrobat update on it's own and get deactivated.
PLS NOTE: I COULDN'T POST THIS IN r/Piracy, I DON'T KNOW ANY OTHER SUBREDDIT.