everything was fine when i finished setting up the localhost, now was the time to work around the code base therefore, i installed ‘windows subsystem for linux’ to link it to ubuntu terminal , and from that time i am getting this error, and even the main page is not displayed.
well, i did nothing and the issue is resolved after 10 hrs, on its own! 
I’m glad !
From what I can tell, postgres and elasticsearch were not running.
While you can use the website to some degree without elasticsearch, the absence of postgres will cause the 500 error you saw.
You can see the relevant lines in the errors in the log:
Error: not found coming from the elasticsearch package
and ECONNREFUSED (short for error connection refused) with the address 127.0.0.1:5432 -> 5432 is the postgres default port
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