Hi Jan,
Thanks for reaching out.
I have checked your website and found that the default header and the footer are assigned to the pages. I would suggest you deactivate and delete Pro and reinstall it by downloading from your Theme Account and check if that issue exists or not.
If that does not help, there might be some different reasons behind your issue. I would like to suggest troubleshoot the following common issue to help us to recognize the reason.
1.Theme Related Issue
2.Plugin Conflict
3.Theme Update related issue
4.CSS/JS Customization
5.Disabling Cache
If you discover that an issue is coming from a custom code or 3rd party plugin, kindly consult with a developer or contact the plugin author. Please note that we do not provide support for custom codes and 3rd party plugins.
If none of the above helps and you are still getting the issue, please provide login credentials for your site in a secure note to examine it further, including:
– WordPress Site URL & Login URL
– WordPress Admin username/password
To create a secure note, click the key icon underneath any of your posts.
Thanks