Insufficient memory is the most common cause of problems/crashing. If you’re on a mobile device, try exporting your scene with lower quality settings to reduce file size/memory usage. If you’re having trouble viewing someone else’s content, contact the author and ask them to export a mobile-friendly version of the scene.
If you’re on a desktop or laptop with plenty of video memory, try the following:
Restart your browser.
Restart your computer.
Make sure you have the latest version of your browser installed.
Confirm that you have the latest version of your video card drivers installed.
If you’re still having problems, contact support@marmoset.co.