Hello,

And welcome!

You have a script error in your index.php file.

In fact, it related to the insertion of the Alexa Certify Javascript code (so maybe managed by your site template ?).

This one is included inside the Google Analytics code, so if the 2 are managed by your site template (options of site template) the bug is from your site template provider.

Why a bug ?

As there is a script error on the page, this one is breaking Joomla handler session and iCagenda pagination script using session.
For this reason, the pagination is broken.

But to confirm that the issue is only with the script error, try with another site template first : for example the core Protostar

Best Regards,
Cyril