As a new android user I was happy to test out NBZ360

I have a nzbet and couchpotato server running on a NAS using reverse proxy (HAProxy) with SSL enabled.
I did configure NZBGET without any trouble, all working as expected.
My issue is regarding couchPotato.
I get this error :

everything seems correct in the settings...
IP/Host : myuser:mypassword@cp.mydnsname.com
Server port : 443
API Key : correctly wrote
Use SSL/HTTPS : checked
My version of CouchPotato's is : 63560efe (31/8/2015 21:26:55), Master branch
What could be the problem ?
Regards