Using {"rawtext":[]} throws a "Failed to resolve RawMessage" error and prevents server UI from loading.

Partner Rank: High

Verification Builds: 1.21.22 / 27262419

Regression Builds: Unknown

Summary: Using {"rawtext":[]} throws a "Failed to resolve RawMessage" error and prevents server UI from loading.

Affects currently Live Content: No

Impact: Server UI fails to load completely when using dynamic data (i.e. rawtext build programmatically) with:

Repro Steps:

1. Attach the provided sample BP to a world.
2. Break any block.
3. Observe the UI loading behavior.

Observed Results: The server UI fails to load, and an error message is thrown: Failed to resolve RawMessage.

Expected Results: The should resolve to an empty string and allow the UI to load correctly.

Screenshots/Videos attached: Yes (and sample BP)

Sample BP: https://www.dropbox.com/t/tydr7Zn4HGAPps6Z 

Notes: