Wireless configuration

Hello everyone, I have a problem with Archer C7 v2 and one wireless QCA9880. I see only one radio on my device, when I scan Wifi. I checked configuration both radios and I think that all is ok, the configuration is same as on other devices which I have. I checked boot log on the device and I see a few line with errors.

  *firmware ath10k!pre-cal-pci-0000:00:00.0.bin: firmware_loading_store: map pages failed*
*  ath10k_pci 0000:00:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/ct-firmware-5.bin failed with error -2*
*  ath10k_pci 0000:00:00.0: Falling back to user helper*

I don't understand why. I had a problems on this device when I flash OpenWrt version 18.x.x. After flash and power on, the device wrote on the terminal kernel panic and device was not function. I waited on new version OpenWrt and I tried again with vresion 19.x.x. The device is run, I see the device on network, I can configuration, but I cann't see both wireless network. Can you help me please?