Hi,
I looked at the report of the cron task on our end for your website and I can see an error "syntax error, unexpected token "<", expecting end of file".
If you open the cron URL on your end, you should see it.
However, it's not the full error message because the "debug" setting of the Joomla configuration is turned off. So I can't say exactly what to do. It could come from anything.
What you should do is this:
- reduce temporarily the frequency of the cron to 1 second
- turn on the debug setting of your Joomla configuration
- open the cron URL with your browser
You should then get the full error message. Please provide a screenshot of the whole thing and we should be able to tell you what to do.