Unable to Start 5GHz Radio on Cudy WR1300

Just flashed today on my Cudy WR1300 router. sadly now I cant get 5GHz running :confused: any ideas what I might have done wrong? it saying Openwrt wireless is not associated and Device not activate. please help me

Does this help? - No wifi after installing openwrt-21.02.0 on Cudy WR1300

please can you help me in this problem? whats the reason for this problem?

When i choose channel 36-48 then showing like this screenshot.

When i choose 52-144 then showing like this

Device is not active
Wireless is not associated

Whats the problem with 5GHz? how can i solved this? please help me please