5xx (Server Errors)-in Wordpress

[FidelityOne]

Since going to a wordpress platform in November,  I have seen many 501 server errors in the crawl report.

When I click on the link in the report however, the link shows the actual page with no errors.

I reviewed all the Q&A but didn't see anything related to this issue. Does anyone have an idea as to why the actual link works when I click on it but the SEOMOZ crawl bot is showing a 5XX error.

Thanks for any ideas or feedback you may have.

[TakeshiYoung]

Does it show up as an error in Google Webmaster Tools? Also, it may have been a temporary issue that has since resolved itself.