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First, try simply rebooting the drone and WGCWisprGroundControl. There have been one or two instances where the Vio appeared to pull its parameters yet lacked full functionality, but was resolved with a restart.
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Select Vio as your payload in WGC WisprGroundControl before booting (so you do not have to reboot after)
Connect your Vio to the quick attack attach via the gimbal
Power on the drone and open QGroundControl and allow parameters to load fully
Once loaded close QGroundControl and open WisprGroundControl, allow parameters to load and you should have a working stream and you will have full function of the roll wheel. IF YOU UPDATE TO A NEW WISPR VERSION, YOU WILL NEED TO CONNECT TO QGROUNDCONTROL AND ALLOW THE PARAMETERS TO LOAD. CLOSE OUT AND NO RE-ENTER INTO WISPR GROUND CONTROL.
When I use the Gimbal Center button, I lose control of the gimbal afterwards.
Boot the drone, and open QGC. Allow the parameters for the Vio to fully load.
Tap the down arrow to the right of the “Values” widget on the right side.
Select ‘Camera’ from the drop down options.
You should see 'Vio Payload F1” (or G1) in the widget.
Tap the Gear Icon to the left of ‘Camera’ on the widget.
Tap ‘Setting Target'
Change to ‘Gimbal Device’
Where you see Gimbal mode, change to Follow. If this is already set to Follow, change it to Lock and then back to Follow.
Change the ‘Setting Target’ back to ‘Camera Device’ and press OK.
This should resolve the issue. Be sure to verify the gimbal has full control after using the Gimbal Center button in WGC.
During boot, the gimbal moves around as it orients itself as normal. However, immediately after centering itself, the gimbal goes completely limp.
Using the steps for the issue listed above should resolve this issue.