Form added but when sent test message: "There was an error trying…

Hi folks,

I have added the form correctly to my page:
https://topvotedapps.com/contact/

Yet when I try to send a test message, it does not work properly and gives an error at the bottom of the form saying:
“There was an error trying to send your message. Please try again later.”

My mail form settings can be seen in this screenshot:
https://imgur.com/BPcayAX

Any ideas what the problem is?

Thanks for your help