Hi, you can try another way to insert the pie chart into your "Blank Pie Chart Box" area as you have shared.
Assume that, Your table range is A1:F7, Where A column is chart "Series Name" and F column is "Annual Total"
Step 1: Select your pie chart title and press "Delete". Now it will looks like below:
Step 2: Now Right click in your pie chart area box and select "Select Data". This will show you a dialog box.
Step 3: Click on "Add" button and fill the "Edit Series" dialog box as below and click on "OK".
Now to Add the Legend Title follow these steps:
Step 4 : Click the "Edit" button under "Horizontal (category) axis Labels" of this dialog box.
Step 5: A new dialog box appears named "Axis Labels". Fill it up by selecting the A2:A6 cell. It will looks like below and press "Enter" and click on "Ok" twice to close 2 dialog boxes.
After closing dialog boxes it will looks like below:
Now add legend or chart title by clicking on "+" sign after selecting the chart or others modification whatever you need. And then it will looks like below:
Hope this will help you.