It looks like that the 's' of 'https' of the proxy setting results into a link. https://github.com/elastic/integrations/blob/26aa97053b98eb9005ca7e8ae66644f0e1161739/packages/cisco_umbrella/data_stream/log/manifest.yml#L130 
It looks like that the 's' of 'https' of the proxy setting results into a link.
integrations/packages/cisco_umbrella/data_stream/log/manifest.yml
Line 130 in 26aa970