I can't login at mobile app for external connection?

How Can I allow external authorization? I have a keenetic router with cloud. So I can connect to Home Assistant via my cloud domain name ex: ha.domain.keenetic.local will redirect to my HA web (internal 192.168.1.2:8123). I start app and log in, then I got an error

Custom response validation failed with error: 405, 405: Method Not Allowed

Code:
Alamofire.AFError 9