1. run a chart script from our Chart Gallery ( these scripts are from a much older version of the charting package )
2. in v15 there is a new chart option of Title Font that did not exist in the old charts. When the old script is run, the Title Font is defaulting to "Times New Roman". The font "Times New Roman" is nowhere to be found in the old script.
3. Consider switching "Title Font" font family to whatever the "Font" was in the old script. All that would be needed is to get the font family, don't detect the font size. 

see attached