Hi isobel336,
Thank you for reaching out and sorry for the trouble caused.
This error is generally associated with an application crash or installation issue and can sometimes occur due to corrupted preferences, incomplete updates, licensing issues, third-party software conflicts, or installation corruption. Please try the following troubleshooting steps:
Ensure that the application is updated to the latest version.
Repair the Acrobat Installation (Windows)
Try the troubleshooting steps suggested in the following help document: Adobe Acrobat crashes.
If nothing helps, try re-installing the application using the steps suggested below:
Uninstall the application, then run the Acrobat Cleaner tool from the following link: Acrobat Cleaner tool.
Reboot the machine.
Install Adobe Acrobat from the following page: Install Acrobat.
Let us know how it goes.
Thanks,
Meenakshi