after an half day I find that icagenda plugin (ver 1.4.5) broke smart-newsletter.
In the preview I see this error http://prntscr.com/pewmyx
1054 Unknown column 'a.acy_created' in 'where clause'
Thanks for help,
Thanks for the bug report, we will take a look at it in the upcoming weeks.
Have a good day!
By the way, could you please send us your Icagenda extension through the contact form?
This way we would be able to give a try on our end.