Bridge between WAX206 and WAX202

Hello,

I have a problem with establishing bridge between two routers:

1) Main Router - WAX206 with software version 1.0.4.0. It works in router mode and have three wifi:
- Primary (5g)
- Secondary (2g)
- Third (5g) dedicated for bridge (I wanted to separate it)

2) Bridge Router - WAX202 with software version 1.0.5.1. It works in bridge mode (https://kb.netgear.com/24105/What-is-wireless-bridge-mode-and-how-do-I-set-it-up-on-my-NETGEAR-router)

The problem is that Bridge Router cannot connect to Main router. It's aways in state "connecting...", of course all devices like PC, smartphones don't have problem with connecting to Main Router. In Bridge router I tried to connect to all of three wifis, but it's always the same - cannot connect. The distance between routers is around 5 meters, so it's not a problem.

What I do wrong, should I change something in Main Router?