Since I installed preview 3 every time I add my server the app crashes. I send you the reports I hope it will help to figure out why this happens.
Greetings keep up with the good work!
Cannot reproduce this one. Does crash happens right after you added OH platform or some time later? Also, what’s your OH version?
I use OH 2.1 (openhabian on raspberry pi 3) it happens shortly after I have added the server. Wich login/PW has to be used for adding OH?
I will try to remove some items maybe there is something wrong with the import of the items. (I don’t know how the communication between the app and the server is realized)
I just restarted the server twice, now it’s working again.
Hmmm 
It was crashing because of 404 response from the server, which shouldn’t really happen with pre-defined OH APIs, so maybe some was off with OH server.
In any case, at least, it helped me to prevent similar crash in the future, even if error happens.
Thanks for the report.