Problem with configuration GREE+ and MikroTik hAP ac²

Hi guys, I have problem with configuration mikrotic router with AC modul.

There is GREE+ app installed od iphon.
AC works only on 2.4 GHZ, 5G is disabled

Bluetooth can find AC, it is loading, but stops after 69%

I tried change something in router settings but doesn’t work

Can you help?

I have same error, have any solution?