How about decorating uncaught exceptions with line and column number?

[Marvin-Brouwer]

If you currently try to format this into a DateOnly property:

{
   "date": ""
}

You will get the a FormatException with the message: "String '' was not recognized as a valid DateOnly.".
This is similar for all formatting errors.

Arguably, that's the error you'd expect. It's just malformed data.
Would it make sense to wrap the call to IConverters in the library in a try-catch and decorate the data dictionary with a "line" and "column" property?
Or maybe even the Mapped property it's trying to convert like when you try to null a non-nullable?

Perhaps it even makes sense to wrap any exception in a ConverterException and just pass the exception as inner exception?