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 SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:847)'),))'