Cannot edit an event under Abu Sefein church "schedule times" events

I was trying to edit the event "english and Arabic prayer meetings" for Abu Sefein church, but I get an error saying that I mistyped a URL or don't have permission to edit.

Go to Abu Sfein church click on "Admin" button Click on schedule items Click on "English and Arabic prayer meetings" Click on "edit" button I get an error!

Thanks Mina