Hi, We are able to login to Thingworx with the wcadmin password,but getting 403 Error when validating in ptc-windchill-integration-connector the connection between thingworx 8.0.1 and Windchill 11.0 M030.

Could you please supply application logs and if there are any logs from the integration connector side?

You may want to submit a ticket to the tech support to have a dedicated resource look into the problem.