500 error while downloading reports in kibana

[sushovan23]

Version details:
elasticsearch-oss-7.10.2-1.x86_64
opendistroforelasticsearch-1.13.1-1.x86_64
opendistroforelasticsearch-kibana-1.13.1-1.x86_64

How to reproduce:
While trying to download reports in kibana getting following error:
Jul 14 14:50:47 hostname kibana[10656]: {"type":"log","@timestamp":"2021-07-14T14:50:47Z","tags":["error","plugins","opendistroReportsKibana"],"pid":10656,"message":"Failed to generate report: [object Object]"} Jul 14 14:50:47 hostname kibana[10656]: {"type":"log","@timestamp":"2021-07-14T14:50:47Z","tags":["error","plugins","opendistroReportsKibana"],"pid":10656,"message":"ErrorEvent {\n target:\n WebSocket {\n _events:\n [Object: null prototype] { open: [Function], error: [Function] },\n _eventsCount: 2,\n _maxListeners: undefined,\n readyState: 3,\n protocol: '',\n _binaryType: 'nodebuffer',\n _closeFrameReceived: false,\n _closeFrameSent: false,\n _closeMessage: '',\n _closeTimer: null,\n _closeCode: 1006,\n _extensions: {},\n _receiver: null,\n _sender: null,\n _socket: null,\n _isServer: false,\n _redirects: 0,\n url:\n 'ws://127.0.0.1:51353/devtools/browser/6313a14f-bb42-4bca-a9a1-85cde5400ff2',\n _req: null },\n type: 'error',\n message: 'socket hang up',\n error:\n { Error: socket hang up\n at createHangUpError (_http_client.js:332:15)\n at Socket.socketOnEnd (_http_client.js:435:23)\n at Socket.emit (events.js:203:15)\n at endReadableNT (_stream_readable.js:1145:12)\n at process._tickCallback (internal/process/next_tick.js:63:19) code: 'ECONNRESET' } }"} Jul 14 14:50:47 hostname kibana[10656]: {"type":"error","@timestamp":"2021-07-14T14:50:46Z","tags":[],"pid":10656,"level":"error","error":{"message":"Internal Server Error","name":"Error","stack":"Error: Internal Server Error\n at HapiResponseAdapter.toError (/usr/share/kibana/src/core/server/http/router/response_adapter.js:132:19)\n at HapiResponseAdapter.toHapiResponse (/usr/share/kibana/src/core/server/http/router/response_adapter.js:86:19)\n at HapiResponseAdapter.handle (/usr/share/kibana/src/core/server/http/router/response_adapter.js:81:17)\n at Router.handle (/usr/share/kibana/src/core/server/http/router/router.js:164:34)\n at process._tickCallback (internal/process/next_tick.js:68:7)"},"url":{"protocol":null,"slashes":null,"auth":null,"host":null,"port":null,"hostname":null,"hash":null,"search":"?timezone=America/New_York","query":{"timezone":"America/New_York"},"pathname":"/api/reporting/generateReport","path":"/api/reporting/generateReport?timezone=America/New_York","href":"/api/reporting/generateReport?timezone=America/New_York"},"message":"Internal Server Error"} Jul 14 14:50:47 hostname kibana[10656]: {"type":"response","@timestamp":"2021-07-14T14:50:46Z","tags":[],"pid":10656,"method":"post","statusCode":500,"req":{"url":"/api/reporting/generateReport?timezone=America%2FNew_York","method":"post","headers":{"host":"127.0.0.1:5601","sec-ch-ua":"\" Not;A Brand\";v=\"99\", \"Google Chrome\";v=\"91\", \"Chromium\";v=\"91\"","pragma":"no-cache","accept-language":"en-US,en;q=0.9,zh-CN;q=0.8,zh;q=0.7,zh-TW;q=0.6","sec-ch-ua-mobile":"?0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36","content-type":"application/json","accept":"*/*","kbn-version":"7.10.2","origin":"https://kibana-url","sec-fetch-site":"same-origin","sec-fetch-mode":"cors","sec-fetch-dest":"empty","referer":"https://kibana-url/app/dashboards","accept-encoding":"gzip, deflate, br","x-forwarded-for":"10.166.49.109","x-forwarded-host":"kibana-server","x-forwarded-server":"kibana-server","connection":"Keep-Alive","content-length":"898","securitytenant":""},"remoteAddress":"127.0.0.1","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36","referer":"https://kibana-url/app/dashboards"},"res":{"statusCode":500,"responseTime":259,"contentLength":9},"message":"POST /api/reporting/generateReport?timezone=America%2FNew_York 500 259ms - 9.0B"}

Let me know if there is any settings in kibana.yml which I would need to apply to overcome this error?

[zhongnansu]

Maybe this can help?
https://opendistro.github.io/for-elasticsearch-docs/docs/kibana/reporting/#troubleshooting