I am having the exact same issue since the update with a similar error:
Error issuing curl_easy_perform(handle): 56
HTTP error requesting GET http://192.168.0.254:45514/agent.xml (0, No error) (Recv failure: Connection was reset)
SSDP: Error parsing device schema for http://192.168.0.254:45514/agent.xml
I added 10 movies to my server, 4 had no issues with metadata and the other 6 will not grab any metadata.
If you find a solution please let me know.
