From Step 4: Provide a bug report of our guide to Solving Technical Issues : A console log is a listing of the activity that Roll20 is doing while
you play, so we can spot anything that deviates from the norm. Follow
the instructions below to open your log, then just copy and paste
everything into your bug report forum post in the Bug Reports section of the forums and we will aid you further. In Google Chrome
Use the keyboard shortcut: Command - Option - J (Mac) or Control -Shift -J (Windows/Linux).
If that doesn't work, follow these instructions: <a href="https://developers.google.com/chrome-developer-tools/docs/console#opening_the_console" rel="nofollow">https://developers.google.com/chrome-developer-tools/docs/console#opening_the_console</a>
In Mozilla Firefox
Use the keyboard shortcut: Control-Shift-K (Command-Option-K on the Mac)
If that doesn't work, follow these instructions: <a href="https://developer.mozilla.org/en-US/docs/Tools/Web_Console" rel="nofollow">https://developer.mozilla.org/en-US/docs/Tools/Web_Console</a>
I recommend entering the game, opening the Console, refreshing your browser's webpage to reload the game, waiting a minute, clicking on some of the problematic assets (within the Art Library tab of the Sidebar), and then posting the Log in its entirity as a reply to this thread.