Cannot load external images when setting Base Theater Insert

[TheGreatRedDuke]

Hello!

I love this module so much, but I have one issue that I run into which is that I can't load theater images from an external source.

When I attempt to set the Base Theater Insert to an image on my s3 integration, and then save settings, I receive an error message like:

Bad File Path exists in the submission, rejecting Theatre configuration changes : "https://coolsite.s3.us-east-2.amazonaws.com/npcs/sentient/assassin.webp"

I'm not sure how involved making a change to allow this would be, but it would be super helpful for my game worlds.

Thanks!