Why is an error page showing when searching our website using Google "site:" search function?

[TheDude]

When I search our company website using the Google site search function "site:jwsuretybonds.com", a 400 Bad Request page is at the top of the listed pages.

I had someone else at our company do the same site search and the 400 Bad Request did not appear.

Is there a reason this is happening, and are there any ramifications to it?

[KevinBudzynski]

Did a fast look and did not find anything. Typically it's an incorrect url...

[TheDude]

I'm still seeing an error page at the top of the list with the url of http://www.jwsuretybonds.com:443/

Are there any negative effects of this?