Since the sample project which is shipped with the plugin for ServiceNow is created using TIBCO ActiveMatrix BusinessWorks due to which customers may face the error above. The error can be eliminated in the following two ways.
1). Right click on the project and select Refactor > Repair BusinessWorks Projects. Then check the option "Update Projects to Cloud Edition" to fix the version mismatch issue. Also follow the steps below to remove the "Activity configuration error."
a). Right-click on the project and select "ServiceNow Tools" --> "Download WSDL for ServiceNow Invoke Activity".
b). Provide the "WSDL URL" and check on "Authentication" checkbox and provide the necessary credentials.
c). Click on OK.
d). Click on the process "AllOperationsForProblemProcess" right click on any error activity select "Show Properties View".
e). Under the "General" tab click on the Drop-down of the "Service" menu and select the module again.
f). Save the project.
Repeat the same procedure for all the error activities in the project to remove the "Process variable configuration error."
2). If all of the errors are not removed the customer may need to create a new project. The version mismatch error can be eliminated only by creating a new project in the BusinessStudio Cloud Edition.