I'm sorry to hear that your player is having issues with the site. Could you describe what nature of "doesn't work" your player is experiencing? As in, is the player seeing things he shouldn't? Or is he not seeing things he should? Could you please carefully work through the first three steps of our guide to Solving Technical Issues ? Step 1: Make sure to use the right browser Please check if these issues persist when using both Chrome and Firefox. Step 2: Ensure that there are no extensions/addons interfering with Roll20 Please disable all add-ons/extensions and anti-virus programs. Step 3: Clear your cache If none of the above succeeds, please have him thoroughly work through Step 4 . (Don't forget the complete Console Log, starting from loading the gametable through the first failure of dynamic lighting!) Thank you!