Hello Grrttlucas,
We're sorry for the trouble you had with Adobe Reader, please reboot the machine once and install the latest patch of Adobe Reader from help>check for updates, or manually from DC Release Notes — Release Notes for Acrobat DC Products
Reboot the machine after the update and check.
Assuming you are on Windows machine, repair the installation files of Adobe Reader once and reboot the machine. Repair Adobe Reader from help>repair installation.
Is it specific to one PDF or with all the PDF files? Which operating system/version you are on?
We're here to help, just need more info.
Thanks,
Anand Sri.