Adobe air error meassage

[Narayan_BAeHAL]

Adobe animate 2021 is updated to animate 2023. AIR windows SDK also added. AIR.exe version 50.2.3.1 version installed.

The SWF file created in animate, action script and working in flash player (target). 

If I change target to AIR Desktop 50.2.3.1 it showing error message.

Error #2067: The ExternalInterface is not available in this container. ExternalInterface requires Internet Explorer ActiveX, Firefox, Mozilla 1.7.5 and greater, or other browsers that support NPRuntime.

The system OS: windows 10 with IE11.

[Mod note - moved to correct forum]

[kglad]

did you import that class to your app?

import flash.external.ExternalInterface;