Can you show a screnshow of how you are configuring the cronjob - please hide the domain name and any 'secret keys' in screenshot

I found out what the problem was.

In Joomla 5.2.2 a SEF plugin has been added and you can set it to filter the index.php from the URL.
And it was on and then you get a 301 message.

Jevent will therefore have to adjust the URL so that it no longer contains index.php so that the new plugin can also be set up correctly.

Hopefully that will be fixed soon

Jevents doesn't need the index.php in the URL is you have SEF sending index.php to the / URL - just include the query parameters without the index.php part

That is strange because when I retrieve the link from the calendar that I have to enter in the cron job, it certainly contains index.php.

I got it all working again.

It remains that the index.php is in the anonymous URL and therefore has problems with the SEF plugin of Joomla