I’m using Jerboa v0.0.40 and I can upload images just fine in any community from any other servers, but it doesn’t work with communities hosted on sh.itjust.works. Error I get it “Value <html> of type java.lang.string cannot…” I can’t see the end of the message.
It’s the unfortunate reality of alpha apps, it’s not even in beta yet. But it’s getting better every day and I’m impressed by how often updates are happening! I may give lift off a shot though if it’s working better for you.