Steps to reproduce:
1. Create a new project
2. Under Edit > Project Settings > Editor, set Asset Serialization Mode to "Force Text"
3. Navigate to "https://assetstore.unity.com/" in a browser of your choice
4. Search for "Microsplat" by Jason Booth and press "Add to my Assets"
5. Click "Open in Unity"
6. Import the "MicroSplat" package from the Package Manager
7. Click "Import" again when prompted

Expected result: No error messages are thrown in the Console
Actual result: "Binary to YAML conversion: type UInt16 is unsupported" error is logged to the Console

Reproduced in: 2017.4.39f1, 2018.4.20f1, 2019.3.9f1, 2020.1.0b5, 2020.2.0a7

Notes:
- The issue is not reproducible if Asset Serialization Mode is set to "Force Binary" or "Mixed"
- In 2020.1.0b5, two additional errors are thrown:
"Trying to access current progress scope, but the scope stack is empty"
"Trying to pop progress scope to invalid size (trying 1 stack size 0)"