We are sorry about the error you are getting and the delay in response. Would you mind sharing the operating system of the computer you are using?
We have recently released an update for Photoshop. Please update all the apps to the latest version and check if that helps. Also, are you getting the error with a specific set of CR2 files or all files regardless of the format?
I am getting what seems to be the same error "Could not open 'file.CR2' because of a program error" when trying to load a raw file, this is on all raw files from an old Canon 400D and a new Canon 7D mk II.
If I go to Filter->Camera Raw Filter in the menu I get the message "Could not complete the Camera Raw Filter command because of a program error".
I am running the latest photoshop "21.1.2" and Camera Raw "126.96.36.1997" and Bridge "10.0.4.157"
I have uninstalled all of them and reinstalled them, and also run the standalone Camera Raw Installer.
Photoshop files seem to load and edit without any problem.
The programs are on a new windows 10 PC.
Was there an outcome to what this problem was, and how to fix it.