Deployment error: Debug Failure. False expression when deploy extension

[huy-lv]

Here is the package json of my extension

{
    "devDependencies": {
        "@rocket.chat/apps-engine": "^1.12.0",
        "@types/node": "^10.12.14",
        "tslint": "^5.10.0",
        "typescript": "^3.7.3"
    }
}

When i deploy app, i got the following problem. Pls help!

Error: Deployment error: Debug Failure. False expression.
    at Deploy.asyncSubmitData (/usr/local/lib/node_modules/@rocket.chat/apps-cli/lib/commands/deploy.js:100:19)
    at async Deploy.run (/usr/local/lib/node_modules/@rocket.chat/apps-cli/lib/commands/deploy.js:47:9)
    at async Deploy._run (/usr/local/lib/node_modules/@rocket.chat/apps-cli/node_modules/@oclif/command/lib/command.js:44:20)
    at async Config.runCommand (/usr/local/lib/node_modules/@rocket.chat/apps-cli/node_modules/@oclif/config/lib/config.js:172:9)
    at async Main.run (/usr/local/lib/node_modules/@rocket.chat/apps-cli/node_modules/@oclif/command/lib/main.js:21:9)
    at async Main._run (/usr/local/lib/node_modules/@rocket.chat/apps-cli/node_modules/@oclif/command/lib/command.js:44:20)

[cuonghuunguyen]

Seems u have imported something that's not from the app's directory. Importing some modules that's not from apps-engine/definition will cause this issue as well

[ritwizsinha]

This error happens to me when I have a folder and I try to import all the modules in the folder to a common index.ts file. Then importing anything from this index leads to this error. In the server logs I get
Failed to resolve module [folder name]
This problem did not arise when I imported from the respective files.