Im in the same boat atm. Followed the same tutorial, ended up trying a few things:
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Using Pico OpenXR plugin instead of PicoXR
This worked but when I started the apk on the headset the controllers didnt work. Running it through SteamVR fixed the controllers but the tracking was very wobbly and behaving strange. -
Went back to PicoXR with the non-Pico OpenXR plugins still enabled (like you said above) but it would only run in 2D mode on the headset…
UPDATE:
I just managed to get the PicoXR plugin working correctly. In order to be able to build without the OpenXR plugins enabled you need to open the “B_AssetGuideline_VRTemplate” blueprint and delete the OpenXR plugin elements in the details panel. With that done you should be able to build