While googling for "Intellij GWT HTTP ERROR: 500 No realm ", I got a few SO hits with obsolete URLs:
Newest 'gwt' Questions - Page 8 - Stack Overflow
stackoverflow.com/questions/tagged/gwt?page=8&sort=newest
Block all stackoverflow.com results
50 answers - 11 Nov
Is there way to tell IntelliJ IDEA which output folder to use for GWT .... “HTTP ERROR: 500 No realm” running GWT's “MobileWebApp” sample ...
At the time of indexing, this question probably was on page 8, but it's not there anymore. What do you think about disallowing these kind of urls (having sort=newest for example)?