Unfortunately, going to 14.0 did not resolve the issue for me.
I attempted to use the ‘OVR Build and Run’ which resulted in errors indicating my Android SDK was not found. I followed the advice of the 2 threads below and installed Android Studio rather than rely on the Unity versions. I updated the paths under Edit->Preferences->External Tools but then got errors about the Gradle (only with OVR Build and Run). I installed Gradle as well and updated the path but consistently had build fails with both Unity and OVR ‘Build and Run’ due to the Gradle install not being ‘valid’. I haven’t yet found a way to make it valid.
It’s not likely that I’ve made any meaningful advancements in resolving this issue but I’m documenting it so others can avoid (or perhaps also go down) this rabbit hole.