Can’t edit shortcode

I get an error: “This page isn’t workingwww.spirit-club.com is currently unable to handle this request. HTTP ERROR 500” when I click edit on any of the short codes. Even when I clicked ADD NEW I received the same error.

I tried deleting the Modern Event Calendar Lite folder from the server and reinstalled it and I have the same results.

Any thoughts how to make this work?

Thanks!