Time Series Chart

Hello i woud like display data from a REST API call in a Time Series Chart. I call the data temperature and time whit an mircoflow and i can see the values in a list view  Thats works fine.  Now im trying to display the values temp and time in a Time Series Chart But i get an error message:
1 answers

Are you seeing any log messages in the studio console or server log? 

Did you update the time series widget to the latest version? 

Are you committing the json objects to the database?