Why am I getting an error in dmesg "brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50" when trying to start my Sterling-LWB5+ radio?

I am getting an error in dmesg "brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50" when trying to start my Sterling-LWB5+ radio.

In general, this error occurs when you do not have a 32kHz external oscillator in your design or it is mis-configured. This is required for all of the LWB series radios.

Here is more information about the oscillator: