As the charts provided by FF are not usable I am trying to create a Widget by adding the package fl_chart but I am not able to build the project after creating a widget as it shows error with a very long list of errors.
Here is the url of it.
This is the first time I am trying to add a package to build a Widget.
I also tried to add these as widgets but they also are giving a very long list of error.
One of the major error message is key is null.
Can someone please help me setup this package of fl_chart?