I just got my Homey mini a few days ago. Got my bridge today. When I try to add the bridge I get a message something went wrong. The bridge shows in the app but when I tap to set up I get that message.
Welcome, Steve.
Is that the exact error message? Otherwise please specify.
Try resetting the bridge by turning both the bridge and your wifi off;
next,
power up the bridge;
wait for the blue led animation;
This means you can add it to the mini. Turn on wifi and try adding it to the mini again.
Solved it, thanks anyway.