Newsletter problem

Hi there
We use MailPoet2 to send monthly newsletter to our website subscribers.

This month we are encountering a problem.

For some reason, the duplicate/edit function takes us to a blank page. Neither does the new newsletter function work.

When we open our previous newsletter for viewing, we get this message:

“continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”?

I am suspecting a compatibility issue. But have been trying to find a solution with no success whatsoever.

Would appreciate any help in this regard.

The page I need help with: [log in to see the link]