hey there.. I have the same problem. wf 5.1.1 & wp 3.9.1
Scan terminated with error: We received an error response when trying to contact the Wordfence scanning servers. The HTTP status code was [0] and the curl error number was [7] and the error from CURL was: couldn’t connect to host
and
{"serverTime":"1402567705","msg":"Scan terminated with error: We received an error response when trying to contact the Wordfence scanning servers. The HTTP status code was [0] and the curl error number was [7] and the error from CURL was: couldn't connect to host","events":[],"alsoGet":"logList_hit","nonce":"ac82a54238"}
thanks for help