Why is the CHM file with the API documentation not displayed correctly?

Due to different Windows security settings, there are sometimes problems opening or correctly displaying the technical interface description (file of the *.chm type) after the download.

The navigation tree is displayed, but the rest remains empty.

To view the file correctly, right-click the file in the Windows Explorer, and then select PROPERTIES from the context menu. On the "General" tab in the properties, select the "Unblock" checkbox and confirm the settings with OK.