How to fix Platform IO "No tasks to run found. Configure tasks..."

If you see this message while trying to run a PlatformIO task like Build or Upload:

No tasks to run found. Configure tasks...

you can fix that easily: Open Preferences: Open settings (JSON) in Visual Studio code (the default keybinding to open the action menu is Ctrl+Shift+P).

Then look for this line:

"task.autoDetect": "off"

and delete it.

Now save the file. You can immediately run PlatformIO tasks after saving settings.json without restarting Visual Studio Code !