Maybe you are using beta version. In any case if you are not using Yahoo data provider then please setup the api token for chosen data provider. For intraday you must setup alphavantage data provider. In the beta version there is a 'Setup Api Key' button on Symbol Selection Dialog (see attached). If the chosen data provider is not Yahoo then you must click on this button and provide the api token which you can get for free. Just follow the UI and you will get guided how to do that.
Please give it a try and let me know if you face any problem.