This is the video that had helped me, but what you have to do is go to your game folder, then find the file named dbghelp.dll,
then create a new folder and drag the file to that folder you created, or just rename the file to something else like dbghelp_old.dll like Mr. Beagle had stated and it should work. Good hunting

Start by finding the game in your Library,

Then right click the game and go to properties,


Click on local files, and click browse local files.