The problem it's the compatibility between your Java installed on your computer and the Java who is used by soap (for me it's SOAPUI-5.5.0)
SOAP UI was not supporting very well the last version installed of Java.
Modify the file soapui.bat in (usualy installed here)
C:\Program Files (x86)\SmartBear\SoapUI-5.4.0\bin\soapui.bat
You can see there two lines :
if exist "%SOAPUI_HOME%..\jre\bin" goto SET_BUNDLED_JAVA
if exist "%JAVA_HOME%" goto SET_SYSTEM_JAVA
First line SoapUi is setting the jre directory to the one in is own folder
Second line SoapUi is saying than if you have java installed, use this one instead.
So you just have to comment the second line like that :
if exist "%SOAPUI_HOME%..\jre\bin" goto SET_BUNDLED_JAVA
rem if exist "%JAVA_HOME%" goto SET_SYSTEM_JAVA
And for me it's works where whith all other kind of action (permitting TLS1.1 etc) dont.