LibreOffice container cant connect to backend wopi routes

Hello guys,
I’ve been working on integrating LibreOffice into my Website.

Whenever I want to enter the text editor on my website it tells me: 'Error reading document from memory, please contact the administrator of your server.

Looking into the Terminal of my docker container running LibreOffice I see this error message:

I am not quite sure how to fix it, can anyone please help?

Oh maybe an useful information: The URL is valid, whenever I click it I get the response I am looking for.