As annoying as this issue is, it's an easy and fast fix :)

Start by going in to your library

Then right click the game go to manage and select browse local files


then right click "Official krunker.io client" and then press run as administrator


Then just select yes if you get a pop up asking if you want to do this.

Now the game should boot like normal!

Alternatively you can set set the file as a launch option.

Go to your library, then right click the game and select properties


Then paste this command into the launch options and run the game.



note, if you have a seprate filepath than on your C drive the command won't work :) Just change it to whatever filepath you have!