Unable to fetch resource from https://mediatum.ub.tum.de/services/export/node/1521091/allchildren?q=author=kroner%20or%20author-contrib=kroner%20and%20marker%20isnot%20CKroner with exception:

cURL error 7: Failed to connect to mediatum.ub.tum.de port 443: Connection refused (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)

XSLT processing: Could not load response as XML.

CC:XSLT processing: Transformation failed.