[Plugin: ICS Calendar] Bubble is behind table

I love this pluggin, it is really helpful for keeping our site up to date with our calendar.

I Have one issue that i cannot resolve, when you hover over an event the bubble that pops up is behind the table, so the other events and dates are impossible to read. This happens with the mouse over setting and with the on click setting. (The same thing happens for the more drop down menu).

I am not a great programmer but have spent a while trying to sort this to no avail. Has anyone else had this issue, how did you resolve it?

The URL is https://eglise-reformee-mantes.org/wordpress/?page_id=101

Thanks for any help you can give

Ben