OVRP_1_1_0.ovrp_GetNativeSDKVersion() returns null

So I am trying to upload to the alpha channel but keep getting the error, "Oculus SDK not found or older than 1.0." I have made some headway on this issue and have discovered that, in OVRPlugin.cs, OVRP_1_1_0.ovrp_GetNativeSDKVersion() is returning null. This is causing the SDK version to only ever appear as v0.0.0. And, I assume, this is what's causing the upload error. Has anyone seen this before? How do I get it to not return null, but return the actual SDK version? I am using Unity version 2017.4.40f1 LTS, Oculus Utilities version 1.49.0, OVRPlugin version 1.49.0, and I think the SDK version is supposed to be 1.51, since that's what I was seeing before when I ran in Administrator mode.