GameCube Adapter for Switch support?

[4nickpick]

Hi. I've installed the latest version of Dolphin, in hopes of using my official GameCube Adapter for Switch with it.

Based on the tutorials I've found, I should be able to use it just like I would the official Wii U adapter.

Everything seems setup correctly, as I've installed the proper driver with Zadig.

I've selected Wii U Adapter for Gamecube on all controller ports in Dolphin.

When I boot up a game, I get a ton of these errors in my Log:
inputcommon\gcadapter.cpp:429 E[SI]: error reading payload (size: 0, type: 00)
inputcommon\gcadapter.cpp:429 E[SI]: error reading payload (size: 0, type: 00)
inputcommon\gcadapter.cpp:429 E[SI]: error reading payload (size: 0, type: 00)
inputcommon\gcadapter.cpp:429 E[SI]: error reading payload (size: 0, type: 00)
inputcommon\gcadapter.cpp:429 E[SI]: error reading payload (size: 0, type: 00)


I'm not sure how to futher troubleshoot.

Dolphin Version:
5.0-10497
Branch: master
Revision: c34388f75bfe6fc153f7ab40323456217f2ce092