When I configure a site in Pinger to use https (ssl=true), why am I getting error "EOF occurred in violation of protocol (_ssl.c:604)"?

HI, When I configure a site in Pinger to use https (ssl = true), I receive this error in the log: message="EOF occurred in violation of protocol (_ssl.c:604)" This is on Windows Splunk 6.4.1 Any idea? Thanks