Hi Thomas,
Sorry for the late reply but we hope you got the solution of your issue, if not then please let us know. We are happy to provide solution asap.
And It seems like you are using an outdated version of the theme, so we request you to update the theme to the latest version
You can view this link for updating process
Note: Please take a backup of your site before proceeding. Normally we use duplicator plugin to make a backup.
Here is the video tutorials how to use duplicator and save it to your local computer
Thanks