3 times today (very early morning, early afternoon, and a few hours later just now), my Mod Scripts window locks up. What happens is I can no longer select the black screen of the current script no matter how many times I click on it. I get a message from Firefox that the page is slowing down Firefox. Please see the first screenshot, below. While this is happening, the VTT works fine (as long as it does not encounter errors). In addition, although I have not received it today, for about 3 days, previous, I have received the message like "your session has expired, please restart" on the VTT that kept showing up even after restarting Roll20 and then trying after I close the browser and also after restarting my computer. I am using Win10 and the legacy sandbox (too afraid to try the new one). I'm asking here to see if anyone else has encountered the same or similar before putting in a ticket so as not to beleaguer the great folks at Roll20 support. Screenshot of frozen "Mod Scripts". There are only 3 tabs open on my browser: While the script is inaccessible as above, I can still run things on the VTT, see the chat screen showing a couple of things executed after Mod Scripts misbehaves: I've just restarted the computer and am progressing fine for now.