MAX BRI PRO 5G disconnect 5 GHz signal

I need to stop the 5 GHz router signal to connect a weather logger. The software will not allow the 5 Ghz disconnect box to be checked on the dashboard. In the AP Settings/ Settings / I clicked off the 5 GHz box. Then rebooted unit.

**Does this stop the 5 Ghz signal?
Issue is most likely the weather station but, to confirm
firmware up to date.