Please use tracing to output more parser error information

[i18nsite]

Now parsing error, only a simple sentence : error parsing event object.

I have to create a project and parse strings with serde_json::from_str to see the specific problem.

Please use tracing to output more parser error information

[arlyon]

I have marked this as enhancement and good first issue, thanks for the suggestion! serde doesn't give great errors by default but we could do better here.