Just see a screenshot of what my wordpress page which has content, categories etc is showing me. It showing that my wordpress page has no content and categories. It does not always act this way, but it always act that way. You may visit the page and it shows content, but sometimes when i visit it shows no content. the site is www.home-remedies-hemorrhoids.com what could be the problem?
Right now I am able to see content on your website. If sometimes it shows content and sometimes not, than it may be problem related to database. Contact your host to fix the issue.
If the error always happens when your site has high traffic......then I believe that it's the problem of your web server......You can do nothing about it unless you are using VPS or Dedicated Server......
I had the same problem. It was a conflict between a plugin, the theme and wordpress. Try the plugins one by one and maby you'll find the problem.