Apple configurator

since the last update OS and configurator am unable to use apple configurator I get an error

"Une erreur interne s'est produite. L'appareil n'est pas occupé alors qu'il devrait l'être.
ConfigurationUtilityKit.error-0x321 (801)

I use 5 different iPad and i get the same error
I try make a new profile and same error

do you have any idea
thanks
"An internal error has occurred. The device is not busy when it should be.
ConfigurationUtilityKit.error-0x321 (801)

I use 5 different iPad and i get the same error 

See if any of the suggestions in this older thread shed light...

https://developer.apple.com/forums/thread/21638
Following as also having the same issue
Apple configurator
 
 
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