Synapse pipeline is erroring out with (403) Forbidden error

I am trying to copy data from excel to synapse analytics db. however I am getting below error-

Job failed due to reason: at Sink 'sink1': Not able to validate external location because The remote server returned an error: (403) Forbidden. Source and Sink activity is properly configured. 

detail error - 

Operation on target Data flow1 failed: {"StatusCode":"DFExecutorUserError","Message":"Job failed due to reason: at Sink 'sink1': Not able to validate external location because The remote server returned an error: (403) Forbidden.","Details":"shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerException: Not able to validate external location because The remote server returned an error: (403) Forbidden.\n\tat shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:265)\n\tat shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1673)\n\tat shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerStatement.doExecuteStatement(SQLServerStatement.java:907)\n\tat shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerStatement$StmtExecCmd.doExecute(SQLServerStatement.java:802)\n\tat shaded.msdataflow.com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:7627)\n\tat shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:3912)\n\tat shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:268)\n\tat shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerS"}

did anyone face this kind of error ?

Regards,