An Error Has Occurred

Error connecting to PDFreactor Web Service at http://pdfreactor.rlx.as-vserver.de/service/rest. Please make sure the PDFreactor Web Service is installed and running (Error: fopen(http://pdfreactor.rlx.as-vserver.de/service/rest/convert.bin?apiKey=oHUaLHsPPt2tfWoKY8PkCtdpyh6AJ3): failed to open stream: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution)