I’m aware of this condition. What it’s telling you is that when the IoTaWatt asks iotawatt.com for the current releases corresponding to the various auto-update classes, there is no response for auto-update class MINOR.
I deliberately removed that as part of my diagnostic undertaking on this problem IotaWatt keeps rebooting -- stopped sending data to EmonCMS and PVOutput.
I will add the MINOR entry back in when a new release is available, in the meantime, the message is harmless.