Answer:
Please use the SetFontSearchPath method in the CDBaseChartMBS class to specify where your fonts are.
On macOS, iOS and Windows, the fonts are loaded from the system's font folder.
e.g. if you use ubuntu, you can install the ttf-mscorefonts-installer package and call this method with "/usr/share/fonts/truetype/msttcorefonts" as the path. No backslash on the end of a path, please.