For your "Live Gamer Ultra", I see nothing under required specs that AMD/Ryzen is supported? Is this true?
We strongly recommended using Intel chipset if you are using our GC553 to ensure its best performance.
We have confirmed there’s a compatibility issue when you are using B350 (Ryzen 7 1700, MSI B350M Mortar). In case you encounter the compatibility issue when you are using a USB host controller other than the Intel USB host controller, please contact us: Support | Technical | AVerMedia along with the HWiNFO.
Connect your GC553 then follow the below video: