Not able to load records

[trungdq88]

I was adding a new normal record, then this happen:

Image:

I wasn't able to load my records, and not sure if I can add new record in.

Please help.

cURL:

curl 'https://elite-firefly-737.appspot.com/_ah/api/expertstracking/v2.0/activityMaster/activityMaster?limit=100&email=trungdq88%40gmail.com' -H 'origin: https://expertstracking.appspot.com' -H 'accept-encoding: gzip, deflate, br' -H 'accept-language: en-US,en;q=0.8' -H 'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36' -H 'accept: application/json' -H 'referer: https://expertstracking.appspot.com/' -H 'authority: elite-firefly-737.appspot.com' --compressed

Response:

{
 "error": {
  "errors": [
   {
    "domain": "global",
    "reason": "backendError",
    "message": "Internal Server Error"
   }
  ],
  "code": 503,
  "message": "Internal Server Error"
 }
}