Hello DM Ronaldo, I am sorry to hear that you have encountered this issue. As a note, Roll20 is only supported on Chrome and Firefox. You may run into additional issues using other browsers. With that said, there is an issue currently with using AFoW and Global Illumination at the same time on a page. Do you know if you have any pages that have both of them enable? If so, you can promote a second/dummy account to DM and disable one of those on the page settings without going to that page. If that does not work, please carefully work through the following 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. Step 3: Clear your cache If none of the above succeeds, please thoroughly work through all of the requested information in Step 4 . (Don't forget the complete Console Log!) Thank you!