When Guided Selling is enabled and no Guided Selling Flows are set up, the Zuora Quotes Wizard returns an unexpected APEX error:
The value 'null' is not valid for operator '>'
Error is in expression '{!IF(buttonBarOptions.buttonItems.size>1, true, false)}' in component <apex:outputPanel> in component zqu:productbundleguidedselling
We should have a more friendly error stating that the user should set up the Guided Selling Flows.
Known issue: https://community.zuora.com/t5/Zuora-for-Salesforce/Getting-Error-quot-The-value-null-is-not-valid-f...
