Why do I get a 'Cannot understand what targets. Check if you specified valid targets' error when I run catalyst serve?

If you encounter this error while executing catalyst serve, you can resolve it in the following ways:

• Ensure you are in the correct folder path when you serve targets.
• Ensure your project directory is not empty and contains at least one resource that can be served. Catalyst can serve function endpoints of types Basic I/O and Advanced I/O, client, and AppSail resources. You can also pull the latest code of your resources from the Catalyst console to your local system through the catalyst pull command, before you serve it.