Whenever you ask for help here, please include all of the following information:

• The version of the OpenTools extension you have installed and which causes the issues (see in Joomla's plugin administration page)
• VirtueMart version
• Joomla version
• PHP version
• Webserver (apache/nginx/IIS)
• Does your webserver's log contain any PHP messages or warnings? Please copy them exactly!

Enabling error reporting

Please (temporarily) enable full error reporting in Joomla. This will cause all PHP warnings and errors to be displayed in your browser (in addition to the log files) and will be much easier than trying to find the log file for your current domain.

1. In Joomla's backend go to the "System" -> "Configuration" page
2. In the "Server" tab search the "Error reporting" setting
3. Change its value to "Development"
   
   
   
4. Save the changes

With that setting, all PHP warnings and errors will be shown directly on screen.

Please copy all error or messages to help us track down the issue.

Thank you!