It means that your chart area is small to contain the word. You have following options, in this case -
- Increase the chart area i.e. make its size bigger.
- Decrease the font size (if you don't want to increase chart size)
- (Not in your case, but in other cases words some times are big. In these cases, you can make words smaller rather than writing long words)
Below is the example where ..... is there and I have increased the chart size.