Communities not visible from boost app - eviltoast

I just downloaded the boost app since it released early access, but I’m encountering a problem where I can’t view communities, specifically those hosted on burggit. I can load all the posts in both my subscribed and local feeds, including every last bit of nfsw, as well as access NSFW on other instances. When I try to open a community, including sfw ones, it just gives a 404 error. Since the problem seems instance specific, I figured I’d ask here first before sending a bug report for the app, but if it’s beyond you guy’s control, I’ll just go there instead.