Hi @Damio have you tried this app with LineageOS4MicroG ROM’s? Wanted to verify if this is an /e/ specific issue. Please can you also add details of your device + build version of /e/ you are on and also if you were able to connect to the app earlier or this is the first time you are trying to connect.
Pl raise an issue on gitlab attaching a Logcat with the issue. I am assuming this is because the app may not be working with MicroG but without the logs and details it would be difficult for the dev team to figure out.