Cubase app on an iPad Pro, with an Allen & Heath ZEDI-10 board

Has anybody tried to hook up an Allen & Heath ZEDi-10 board to their iPad Pro, to use with the Cubase app? I’m having trouble (the board is recognized by my iPad…and then 2 minutes later it flashes the “This Accessory is not Supported By This iPad” message). I can get my Windows PC to recognize the board, but not my 1.5-year old MacBook Pro. Ideas? Thoughts?