I'm having a similar issue.

factory_reset on a FAT32 formatted USB drive is not resetting.

I can airplay to "WhiteHot" on home network, and in hotspot mode. Unable to access WebUI with http://whitehot.local/ or 192.168.211.1 or with iPhone AxiomAir App. Unable to control volume from any device (which is why I began this whole process).

Any help would be marvelous!

Cheers,

Ben