Hi Carefree_photographer1779,
Thank you for reaching out, and sorry for the trouble caused.
Please share more information on what happens when you try to save, edit or export PDFs. If you get any error message, please share the screenshot of the message.
Try repairing the application installation and ensure that the application is up to date with the latest version. In Acrobat, go to Menu > Help > Repair Installation or Check for updates.
Try reinstalling the application using the following steps:
-Remove the application and run the cleaner tool (https://adobe.ly/49Bp4pY).
-Reboot the machine
-Install Adobe Acrobat from the following page: https://adobe.ly/3No412z.
Feel free to let us know if you need any help.
Thanks,
Meenakshi