Why am I getting a network loop?

Question

Mikrotik

Good afternoon, I ask for help in this matter, there was a Unifi access point, I decided to move it to another room, put a custom switch in that room and created a vlan there. When I connect an access point, I get a loop on the network (I noticed that the loop began to appear after Reseta of the access point). If you do not connect the access point, but only, for example, a computer to port 2, then everything is fine, there are no loops. One has only to connect a point to port 5, then immediately a loop, what could be the matter?
In the unifi controller, I divide by vlan, so I configure several networks on the switch in port 5.
Screenshots of the switch settings are attached

Answer 1

It was done
1. The switch was flashed
2. The Vlan port where the Unifi controller is located was added to unteg

Answer 2

MESH?