I get error message - Something went wrong, please try again

When trying to submit my name and email, I get the message "Something went wrong, please try again."

I am using MailChimp

Error log
2017-05-08 13:47:35 GMT nope 104.198.108.103 lists/list json 0.118s MailChimp-PHP/2.0.6 2.0 n/a
2017-05-08 13:32:58 GMT nope 104.198.108.103 helper/search-members json 0.02s MailChimp-PHP/2.0.6 2.0 (556) MC_SearchException
2017-05-08 13:10:13 GMT nope 104.198.108.103 helper/search-members json 0.047s MailChimp-PHP/2.0.6 2.0 (556) MC_SearchException