ReadyAPi 3.10 unable to resolve class com.eviware.soapui.impl.rest.actions.oauth.OltuOAuth2AzureCl

I've just upgraded from 3.6 to 3.10. I'm running data driven tests involving 1000's of calls, so I have groovy scripts to check and refresh the Auth2 Azure access token if the test goes more than 40...