Hello Patrick Menzel

Apology for the inconvenience. Please share your administrator access here to check the issue. Use the Hidden Content box to share the credentials. Make sure that you have a full site backup with you before sharing.

Best regards

Here it is

Any Updates?

Good morning, can we get this thing solved? Kind regards.

Good morning!

Please take a full site backup with Akeeba Backup in ZIP format and share here. Follow this tutorial

Hi Patrick. It looks like you made custom header with mistakes.

Offcanvas toogler doesn't work because you have two elements with the same ID. The first one works the second no. This is the expected behavior. It is because of such things that ID duplication is unacceptable.

In general, you should redo it all differently

Hey Pavel, thank for your reply and your work. You mean, I have to make a new custm header section? I did it like the descriptions here to find in the forum, so how can it be, that it has 2 sections with the same id? Kind regards

Apology for the inconvenience. I have fixed your issue. I have chosed offcanvas position to Right. Please check your site.