Error: This tag could not be resolved to an ActionScript class. It will be ignored.

This is a third attempt over 2 years I’ve been trying to get AIR SDK running on my new Mac (still using old Mac with Flash Builder dedicated to Air Apps).

So I have done exactly as the documentation described:

launch.json:

{
	// Use IntelliSense to learn about possible SWF debug attributes.
	// Hover to view descriptions of existing attributes.
	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
	"version": "0.2.0",
	"configurations": [
		{
			"type": "swf",
			"request": "launch",
			"name": "Launch SWF"//,
            //"preLaunchTask": "ActionScript: compile debug - asconfig.json"
		}
	]
}

settings.json

{
    "as3mxml.sdk.framework": "/Users/thisUser/Library/AIRSDK_MacOS"
}

asconfig.json

{
	"config": "air",
	"compilerOptions": {
		"source-path": [
			"src"
		],
		"output": "bin/Main.swf"
	},
	"mainClass": "Main",
	"application": "src/Main-app.xml"
}

Main.mxml:

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
   xmlns:s="library://ns.adobe.com/flex/spark"
   xmlns:mx="library://ns.adobe.com/flex/mx">

	<s:layout>
		<s:BasicLayout/>
	</s:layout>

	<s:Label text="Hello World" horizontalCenter="0" verticalCenter="0"/>

</s:WindowedApplication>

Main-app.xml:

<?xml version="1.0" encoding="utf-8" ?>
<application xmlns="http://ns.adobe.com/air/application/33.1">
	<id>com.example.myAppName </id>
	<versionNumber>0.0.0</versionNumber>
	<filename>myAppName </filename>
	<name>myAppName </name>
	<initialWindow>
		<content>[Path to content will be replaced by Visual Studio Code]</content>
		<visible>true</visible>
	</initialWindow>
</application>

[joshtynjala]

I know you figured it out, but I wanted to add a couple of tips for your previous attempts that didn’t work, so that this information might eventually show up on Google for people having similar issues.

Compiler not found in SDK.

Based on your screenshot, it looks to me like you copied the AIR SDK into a completely empty directory. You need to copy it into a directory that contains a Flex SDK. It’s unfortunate that Adobe named it empty-FLEXSDK-directory in their instructions because it’s not actually supposed to be empty.

“Adobe AIR.framework” is damaged and can’t be opened.

According to this post you can run this command in the terminal to fix this issue (replace AIRSDK_Folder with the actual directory name of your SDK).

sudo xattr -r -d com.apple.quarantine AIRSDK_Folder

(this is probably explained in HARMAN’s release notes too, but that was the easiest result to find on Google)

[ULSashido]

Finally got it to work! Needed a small replacement Main-app.xml to reflect the SDK version!