please Help am Loosing my Site. See the Message i Got. any Suggestions

To: Webmaster of http://codigist.com/,

Googlebot has identified that an increased number of URLs on http://codigist.com/ return a server error HTTP 5xx. As a result, users might not be able to see your content at all, and Google might not be able to index and show your pages in search results.
Start now to fix this problem:
1

Identify and fix the URLs with errors

Open the Crawl Errors report in your Search Console account to review and fix the errors reported for your site’s URLs.

See Crawl Errors
2

Verify

Once you've fixed the URLs with errors, make sure that Googlebot can access and see your content properly. Do this by using Fetch as Google tool.

Fetch as Google