Whenever I try to launch the game I get the message “Files in your Heroes of the Storm installation are damaged.” I haven’t had similair issues with the game in the past and I’ve tried restarting battle.net, restarting pc, re-installing the game, using the scan and repair function and made sure my graphics drivers are up to date.
You can find the most common fixes for this issue here.
If after the above you still have issues then Delete the ‘Heroes of the Storm’ or ‘Starcraft II’ folder located here: %userprofile%\Documents\Heroes of the Storm
All the best.
Thanks! Issue ended up being OneDrive related.