On some installs of the Adobe CC suite you may receive an error (in Photoshop specifically) that says "Unable to continue because of a program error." when trying to open or create a file. In some instances the error appears because your hardware is outdated, and there is also a known bug that has caused this error to appear for no clear reason.
Whether you're affected by the bug or your hardware is outdated, a workaround for the error is as follows:
1.) Open Adobe CC Photoshop 2021
2.) Navigate to Edit> Preferences> Performance
3.) Uncheck box that says "Use Graphics Processor"
Once you have taken those steps, you should be able to close the preferences window and continue using your edition of Photoshop.