WARN: libxml2/2.9.10: requirement libiconv/1.15 overridden by dcmtk/3.6.5 to libiconv/1.16 
ERROR: Error downloading file https://dicom.offis.de/download/dcmtk/dcmtk365/dcmtk-3.6.5.tar.gz: 'HTTPSConnectionPool(host='dicom.offis.de', port=443): Max retries exceeded with url: /download/dcmtk/dcmtk365/dcmtk-3.6.5.tar.gz (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0x7ff45257f7d0>, 'Connection to dicom.offis.de timed out. (connect timeout=60.0)'))'