Unable to fetch resource from https://portal.mytum.de/schwarzesbrett/diplomarbeiten/asRss?keywords=tuspl18 with exception:

cURL error 60: SSL certificate problem: unable to get local issuer certificate (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)

XSLT processing: Could not load response as XML.

CC:XSLT processing: Transformation failed.