Curse of Strahd game unresponsive

When I launched my CoS campaign this morning, which is using the official purchased module, it opened just fine. I was reviewing some upcoming material and I switched maps. The page became unresponsive. I have closed the chrome tab and reopened roll20. I have opened it in firefox. I have restarted my PC and I have cleared my cache. I can open my other campaign just fine. Please help!

You should definitely follow Nicholas' advice. However, if I might venture a guess, based on observations of similar problems with CoS? Were you viewing the Wolf Den page, perhaps with Advanced Fog of War and Global Illumination turned on? If so: 1. Create a dummy account 2. Promote it to GM 3. Log on through dummy account and edit said page to turn off Global Illumination. Assuming this is the problem, and your player flag is not set to said page this should hopefully clear up the issue.