The link provided for "forbidden connections" is outdated: https://meta.wikimedia.org/wiki/User-Agent_policy (it is now a soft-redirect from Meta-wiki to Governance-wiki).
The specific message is:
Failed to open stream: HTTP request failed! HTTP/1.1 403 Forbidden. Please comply with the User-Agent policy: https://meta.wikimedia.org/wiki/User-Agent_policy
The correct URL is: https://foundation.wikimedia.org/wiki/Policy:Wikimedia_Foundation_User-Agent_Policy
(Original user bug-report)