Inserting Calendar breaks the page

[Teodor]

Are you sure this is not same issue as reported here:

Calendar resources not available on unpkg.com

Seems that they standard point the cdn to the latest version and that broke with the 5.0.0 release from yesterday. Here a fix. Edit all the urls from the fullcalendar to include a version number: <script src="https://unpkg.com/@fullcalendar/core/main.min.js"></script> <script src="https://unpkg.com/@fullcalendar/core/locales-all.min.js"></script> <script src="https://unpkg.com/@fullcalendar/interaction/main.min.js"></script> <script src="https://unpkg.com/@fullcalendar/daygrid/main.min.js"><…

It will be fixed in the next update.