Failed connection - unspecified radio

[AnM]

Hello. 

Recently having problems with industrial tablets that are trying connect to wifi on locations. In logs i can see 

This is both on firmware 30.7 and 30.7.1. I have MR36 on locations. I can't seem to find any informations about this specific reason.  

I would be gratefull for any kind of tips/help. Thanks

[GreenMan]

Just to be clear - it doesn't say 'unspecified radio' - this event is being seen across two radios;   2.4 GHz (radio 0 [channel = 1]) and 5 GHz (radio 1 [channel = 36])

The reason is unspecified.

I would check whether those client devices of yours support WPA3.  This technology is usually associated with 6 GHz W-Fi 6E and later - and require specific client side support.   My guess - based purely on the radios mentioned here - is that the Meraki APs may not support 6 GHz either.