Can you provide a screenshot of your configuration and your DS Microflow?
You also need to set up the other tabs and define the dimensions and data points.
The datasource microflow is expecting an input object oft type MyFirstModule.Values. Check the dataview the chart object is placed in, if this is of type values this is the parameter your microflow will expect.
Please find an screenshot of microflow and chart configuration:
Microflow should have one parameter of type MyFirstModule.Values.
This error occurs because your chart is placed within a dataview of type Values. If you add this as a parameter in the microflow the error should be solved.
If you do not want this entity to be the parameter then place the chart in a differten dataview source.