GL-AX1800 Wifi not visible

Unexpectedly both Wifi bands stopped working at my Flint router, no settings have been changed. When I first logged in to the admin portal instead of Wireless menu option I saw Mesh and I didn’t find a way to bring back Wireless.
I’ve tried to do firmware upgrade that didn’t help.
Then I did factory reset after which the Wireless page was back and I could edit settings, but Wifi doesn’t come up (SSID Visibility is set to Shown and I also tried to connect by providing SSID but network is not found)
I’ve also tried Uboot update but it did nothing

Which firmware version is in use? 4.5
How is your router connected to the Internet? it’s connected to a DOCSIS 3.0 modem via ethernet cable. The ISP is Spectrum
Which DNS server do you use? The local one of the ISP
Do you use DHCP or static IP addresses? DHCP