Please share the output you are getting in Logstash.
Also, the log line you share is a json, why are you using a grok filter to parse it instead of a json filter?
If you are getting a _dateparsefailure it means that the value of in your Timestamp field is not matching any of the patterns you specified, you need to share a sample document that is giving you this error and the logstash output you are getting.