Admin pages return errors or don't work correctly after installation / upgrade
Explanation: This is usually caused by Magento stored cache or Compilation mode enabled.
Go to file includes/config.php
- If you still get error, rename file app/etc/local.xml and re-install Magento. It will NOT erase your site data but it may solve your problem
Cannot read property 'selectionStart' of null / el is null
Explanation: This is a common Magento bug when your editor is hidden.
Solution: Press button Show Editor and insert widget with the insert widget button button.
If it doesn`t help use this code as an example to insert web-form:
In this case WYSIWYG editor should be hidden or turned off
Forms Settings returns 404 error
Explanation: Extension permissions are not applied.
Solution: Log out and log in again.
Extension is not installed after all files are copied
Explanation: Extension installation script wasn't triggered
Solution: Please check that you have correct file permissions for newly copied files. Incorrect permissions can block scripts from being executed.
Extension was installed but I don't see it in admin
Explanation: Admin role permissions don't allow you access extension functions
Solution: Please check your admin role permissions in System > Permissions > Roles and check required resources.
"Error(s) occurred" message on form submission
Explanation: You may be forcing trailing slash in your .htaccess file and submission data is lost
Solution: Please add the following rule to your .htaccess file: