Dear Members, 

I have installed Cache extreme plugin .... it has crashed my site.... can anyone help me how to restore my site

Error 500
Internal Server Error.
If you are the site admin, click here for details (+)Something went wrong!
To get the error details follow these steps:
- Open ow_includes/config.php file and set DEBUG_MODE to true
- Reproduce your last action.Error details:Type:ExceptionMessage:Can't find master page `'.html_document.'` !File:/home/jsrconsu/public_html/plannerforum.org/ow_core/theme_manager.phpLine:240Trace:#0 /home/jsrconsu/public_html/plannerforum.org/ow_core/html_document.php(602): OW_ThemeManager->getMasterPageTemplate('html_document') #1 /home/jsrconsu/public_html/plannerforum.org/ow_core/response.php(200): OW_HtmlDocument->render() #2 /home/jsrconsu/public_html/plannerforum.org/ow_core/application.php(445): OW_Response->respond() #3 /home/jsrconsu/public_html/plannerforum.org/index.php(91): OW_Application->returnResponse() #4 {main}