Cannot add live data set on the Data Preparation Web UI

[TalendSolutionExpert]

Talend Version	6.3.1
Summary	Cannot add a live dataset.
Additional Versions
Product	Data Preparation Web UI
Component	Data Preparation
Problem Description	Adding a live dataset on the Data Preparation Web UI, no Jobs are visible, and the following error message occurs: In the log file you can find errors like: 2017-10-19 17:18:25.766 qtp809 [user 2] ERROR o.t.d.e.TDPExceptionController An error occurred org.talend.dataprep.exception.TDPException: UNABLE_TO_LIST_REMOTE_TASKS:{Error=Insufficient right. You must have one of the roles [Designer, Operation manager, Viewer] for action [listTasks].} at org.talend.dataprep.command.tac.client.TacClientSupport.readListTasksResponse(TacClientSupport.java:271) ~[dataprep-ee-backend-service-2.0.0.jar:?] at org.talend.dataprep.api.dataset.location.job.ListTasksCommand.processResponse(ListTasksCommand.java:49) ~[dataprep-ee-dataset-2.0.0-lib.jar:?]
Problem root cause	The TAC credentials set in the Data Preparation config file are different from those used to connect to TAC.
Solution or Workaround	Check the application.properties file under dataprep\config, and see: # TAC user: # It must have "Operation Manager" or "Designer" role and have authorization on required projects to list tasks in "Talend job" datasets. # It must have "Administrator" role in TAC, in order to list users and groups for sharing. tac.user-name=xxxxxx tac.password=xxxxx Ensure the credentials are the same as the admin user connecting to TAC. The password is encrypted, so you need to stop the Data Preparation Web UI. Re-enter the TAC user credentials. Restart the Data Preparation Web UI. Add a dataset from the Job.
JIRA ticket number