Cannot read property 'charCodeAt' of undefined about chatbot-app HOT 3 OPEN

Hard-coding 'const projectId = 'test-chat-bot-app-321808' didn't help.
'const projectId = process.env.GCP_PROJECT || process.env.GCLOUD_PROJECT' either.

from chatbot-app.

key.json:
{
"type": "service_account",
"project_id": "test-chat-bot-app-321808",
"private_key_id": "d1eea17c739f1869541d87fec30cd6ecd01c4c83",
"private_key": "-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n",
"client_email": "chat-bot-app-test@test-chat-bot-app-321808.iam.gserviceaccount.com",
"client_id": "109871563487861484894",
"auth_uri": "https://accounts.google.com/o/oauth2/auth",
"token_uri": "https://oauth2.googleapis.com/token",
"auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
"client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/chat-bot-app-test%40test-chat-bot-app-321808.iam.gserviceaccount.com"
}

from chatbot-app.

hardcoding all of the credentials finally helped me:

const projectId = 'test-chat-bot-app-321808'
const sessionId = 'bot-session'
const languageCode = 'en-US'

from chatbot-app.