As part of its ongoing infrastructure updates, the jQuery infrastructure team is making configuration and deployment changes to address intermittent outages reported by some users. The issue is the result of faulty IP allowlisting which affects users downloading jQuery project assets from certain IP addresses.
This issue is expected to be resolved in the next few weeks. In the interim, users can mitigate the issue by downloading and serving the files they need.
CDN migration is part of a package of infrastructure improvement projects the project has been undertaking this year. The infrastructure team plans to provide a full overview of these improvements, which will help support the long-term maintenance of jQuery and its related projects, later this summer.