It seems that there are going to be some api changes in lemmy version 0.19 which will break all the current apps unless they are updated to account for the api changes.
Further information - https://lemmy.ml/post/5711722
This post is just to ensure that @aeharding@lemmy.world and other users are aware of this. I will also open an issue on github.
It appears to work but on some instances the list of communities doesn’t populate. I’m not a dev so can’t see what needs changing.