Which error are you receiving?
HTTP 500 or HTTP 503
See this article on how to troubleshoot plugin conflicts:
404 Page Not Found
- Login to your WordPress admin and go to Settings > Permalinks
- Ensure Post Name is selected
- Click Save (even if you didn't change anything)
- Make sure the page you are trying to view actually exists.
Blank white page - cannot access WordPress admin
See section two of this article or contact us:
PHP function error
Most PHP errors will give you a path name of the file that is faulting which can in turn tell you what part of your site is experiencing problems.
For example, a Fatal Error in /path/to/your/domain.com/wp-content/plugins/some-plugin/file.php tells you the problem is in some-plugin.
If you can access your admin, visit the Plugins page and deactivate all the plugins. Now reactivate only the essential plugins you need. If the error re-occurs after activating a specific plugin, deactivate it again, delete it, and reinstall it.
If you are getting PHP errors in your theme, please contact us.