Cancelled request due to invalid content

Thank you for your earlier reply, suggesting that I download SoapUI Pro. I have no problem hitting the same SoapUI project using Pro. So it is a mixed message here. Although I am glad that I have a means to test my REST services with SoapUI Pro, the unsupported version apparently has a bug which causes this issue I have experienced. Since I used the ZIP of the Pro Trial, I have both the 32-bit SoapUI installed, with JRE, and the Pro Version, without JRE, extracted to a separate location. I can use the same project in either Pro or SoapUI and I can repeat the issue in SoapUI. This does not instill confidence.

SoapUI-4..6.4 Unsupported

java.version=1.7.0_40
java.vm.info=mixed mode
java.vm.name=Java HotSpot(TM) Client VM
sun.boot.library.path=c:\program files (x86)\smartbear\soapui-4.6.4\jre\bin
soapui.home=C:\Program Files (x86)\SmartBear\SoapUI-4.6.4/bin

SoapUI-Pro-4.6.4 Trial

java.version=1.7.0_51
java.vm.info=mixed mode
java.vm.name=Java HotSpot(TM) 64-Bit Server VM
sun.boot.library.path=C:\Users\<me>\Tools\Java\JDK\jre\bin
soapui.home=C:\Users\<me>\Tools\SoapUI-Pro-4.6.4\bin\

My reported issues were with 64-bit (with and without JRE) and now 32-bit (with JRE). And add SoapUI-5.0.0-beta (Zip) to the list, as well.