I have 4 backdrop sites all running on one backdrop instance (obviously using multi-site). Two sites have an issue when you go to Functionality>List Modules the "more" link will not expand to show dependencies. The other two sites work fine.
I have looked and looked between the four sites and can't figure out anything that could be causing this. There's not a particular module that's different between them. All modules are shared so there aren't version differences. I've used the Chrome developer console to look for errors, etc. I've tried searching extensively and can't find an answer here or on the Internet.