This was reported as fixed in 2024.4.1p3 but it looks like the problem crept back in and exists in SDK 3.8.2 / 2025.3.1 (haven't tested any other versions). Since the previous canny was closed out as complete, thought I'd open a new one.

Prior bug report on this issue:

// This works

if(VRCJson.TryDeserializeFromJson("\"{\"data\":\"test\"}", out DataToken token2))

Debug.LogError("Failed to deserialize JSON");

else

Debug.Log("Successfully deserialized JSON");

// This fails. Only difference is the braces after the word test in the JSON string. Number of braces or their configuration doesn't seem to make a difference.

if(VRCJson.TryDeserializeFromJson("{\"data\":\"test{}\"}", out DataToken token1))

Debug.LogError("Failed to deserialize JSON");

else

Debug.Log("Successfully deserialized JSON");

Thanks! -Tea