Describe the bug
When attempting to set a profile at runtime by following these instructions, a null reference error is thrown.
To reproduce
Steps to reproduce the behavior:
- Configure and save an MRTK profile
- Give the script a public MixedRealityToolkitConfigurationProfile named profileToUse
- Include MixedRealityToolkit.Instance.ActiveProfile = profileToUse
- Set profileToUse to the previously saved MRTK profile in Unity Inspector
- Run in play mode to get the error
Expected behavior
The MRTK profile should switch easily.
Screenshots

Your setup (please complete the following information)
- Unity Version 2020.3.36f1
- MRTK Version v2.7.3.0
Target platform (please complete the following information)