Recently Legends Of Learning had required the developers to include a file called lol_spec.json that includes information about the SDK version you are using in your games. This update creates the lol_spec.json file automatically on your exported project, so you don't have to worry about handling it manually by yourself. Not including this file will cause an error when uploading your project to the LoL platform.

Please make sure you update the plugin to the latest version v0.0.0.6 to support the latest requirement.