@crcoli7307 Yes that was exactly the topic I followed through 
Thank you for the topic!
So I changed the S3_CDN_URL to:
DISCOURSE_S3_CDN_URL: https://s3.jrbit.de/tosdr-community
But sadly this broke everything, in terms of where the stylesheet loads from.
Could this be the bucket name as its almost equal to the domain?
Bucket name: tosdr-community
Domain: tosdr.community
See how the stylesheets are constructed.