Hi @power911,
Looking at that plugin repo in gitub in the Issues tab it seems there’s still some testing to be done including with FooGallery so it may well be that it’s not compatible with FooGallery in a MultiSite environment yet.
If you can add images to a gallery from the local media library without any issue then that would suggest something to do with Network Media Library. Are you able to test that for me?
It’s a really great idea for a plugin so I can talk to the development team about whether they can help with testing. One concern I have is that there have been no updates to the plugin since March so we’d need to persuade the Human Made developers to implement any new changes required to ensure compatibility.
If you can start by confirming you can create a new gallery from local media (not network) that would be great. If that fails try temporarily disabling Network Media Library and try again. This will help determine if it’s the plugin or something else.
Thanks in advance.