Thanks!
Edit2: it works, thanks a lot!!
- I've created devices lan1.20 and lan2.20 (vlan=20). MX4300 in a Dumb AP mode connected to lan2.
- Bridge br-home = lan1.20 and lan2.20
- Create Interface Home -> bridge br-home
- Assign interface Home to SSID.
- Apply
[Reboot] !!!!