FileMaker Webviewer not displayed in preview mode
 
	I want to display the Fusion charts radar chart in the FileMaker Pro Web viewer. However, it looks correct in Brows mode, but nothing in Preview mode. 
	Also, when I print it, nothing is displayed.
 
	Why is this? 
	Is there any countermeasure?
 
	Please give me advice.
 
	environment: FileMaker Pro 19, Javascript, Webviewer, Radarchart, Fusioncharts-XT, Web Server (ChartScript) - Locap MacBook Air (Custom App).