I'd suggest going through the steps I've pasted below the horizontal rule, and if those don't narrow down the issue, file a Help Center Request . You can also try loading in a private browsing window, or creating a Dummy Account and promoting it to GM. Sometimes there is a problem with the specific page that you are trying to load and if a Dummy Account GM comes in on a different page, they may be able to turn off Dynamic Lighting or fix whatever has gone awry. Could you please carefully work through these 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 Step 4 . (Don't forget the complete Console Log!) Thank you!