Well i had a few more screenshots to explain what was going on since i’m not the best with words but in short.
After pressing cancel in steam transaction, the icons for settings, social and back are gone.
Thanks for letting us know. I’ve been able to recreate this bug so will pass it to the Devs now.
A temporary fix is: If you click on another item, like the 1 Battle Chest, then it should restore the icons after you press the red x in the top right corner of the window.