web remote dot2 to android smartphone doesn't work

Can't connect the dot2 1.9 with my android smartphone nokia 5.4 android 10. I use a dlink-AD64 wifi router. Doing the same setup with my I pad works perfect. On the smartphone I get no connection when I put in the IP adres of the dot2.

Anybody any hints?

Thanks a lot!

I tried all of it but still no result.

And if I use the same router to make a web remote connection with the smartphone to my audio console it works perfect. Only the dot2 connection doesn't work ...