The As per ServiceNow comments, the No Sensors Defined message indicates that "the corresponding sensor for the probe is missing or inactive."
You may need to check the third party tool configuration for its sensor definitions in order to find the probe that is producing the no sensors error.
Other Solution here is we need to add one line everywhere whenever REST call is made.
We will be taking care of this in next release but also check for sensor definition at vRA end for now to get rid of this error message.
Isn't the vRealize Automation plugin for Servicenow the 3rd party tool ???? We made the manual updates as a work around. Dave
May be I didn't ubndertand your query but vRA is third party tool for ServiceNow