Thank you very much, this also works wonderfully.
My compliments for the competent help.
However - I don't even dare to say this - there is a data protection problem with the call at netdna.com here in Germany. Because this call is not allowed according to some data protectionists, unfortunately in this case the customer here.
Therefore, we have hosted the Fontawesome locally, but this also did not feel as smooth as hoped. So we still have to find the right path for the local call here, then it should work.