We’ll be using this forum thread to track known technical support issues, like conflicts which cause performance errors, crashes, and connection problems. Check out the list below, and give these steps a try before creating a new topic!
Crashing on Launch - "Files in your StarCraft II Installation are damanged"
This issue is caused by OneDrive being linked with the Documents folder where the folders and files for configuration are stored for StarCraft II. Unlinking OneDrive will work around the issue.