SOAP UI (SmartBear) gets SSL connection error similar to the following one, which you get when you make API call. This error generally occurs if you are using outdated SSL or TLS protocol lower than TLS1.2
ERROR: Exception in
ERROR: An error occurred [Received fatal alert: protocol_version], see
Steps to fix the error:
Add (-Dsoapui.https.protocols=SSLv3,TLSv1.2) in the VMOPTIONS file under the Bin folder.