Detail in the link. Crash reporting should make this a lot easier now though!
I recommend you use Obtainium to install this and other github-based projects, if you aren’t already https://github.com/ImranR98/Obtainium
Also, I realise the apks are getting bigger, I’ll fix that soon, there’s libraries we don’t need…
If I use the ‘Go to subreddit’ search and add a community from another instance the app crashes. Feel free to add this to the GitHub issues list if I don’t get around to it soon.