SyntaxError: Unexpected token < in JSON at position 0

[leonardo-beabr]

I have an AWS Lambda function with slackbots and in some cases, I receive this error:
{
"errorType": "Error",
"errorMessage": "SyntaxError: Unexpected token < in JSON at position 0",
"stack": [
"Error: SyntaxError: Unexpected token < in JSON at position 0",
" at /var/task/node_modules/slackbots/index.js:46:33",
" at Array. (/var/task/node_modules/vow/lib/vow.js:773:56)",
" at callFns (/var/task/node_modules/vow/lib/vow.js:24:35)",
" at processTicksAndRejections (internal/process/task_queues.js:79:11)"
]
}

[leonardo-beabr]

In this AWS Lambda function, I changed the number of retries of 0 to 1 and this message didn't appear anymore.