Hi ayu13, cadzgiz,
In my case, this was something I had added to header.php (but may also be part of a pre-made theme you’re using).
It looks like this:
jQuery(document).ready(function() {
// with a bunch of lines here
});
I was using colorbox via the Lightbox Gallery plugin.
I wanted to change some of the settings, so I was interacting directly with the settings object, which was part of the colorbox object, which extended the jQuery object (if you follow!).
However, on my events calendar page, there was no lightboxs, so the colorbox object never got added to jQuery.
In that case, when I called jQuery.colorbox, it resolves as “undefined”.
This is what appeared to break the calendar script, as it appears that jquery.fullcalendar.min.js is also extended the jQuery object (from what I can tell of the minified code!).
Long story short – I think the issues with this plugin probably all boil down to jQuery conflicts.
To test – Disable all other plugins, and switch to a standardized theme (e.g. twentytwelve). If the calendar works here, but not in your desired theme – you may be having similar problems.
If you like, send me a link to your site and I can take a quick look and see if I see the same issue.
A