Event sub - aws verification issue

Yeah I did the deployment. Going in Cloudwatch I see the following:

{
“errorType”: “TypeError”,
“errorMessage”: “The “data” argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received type number (NaN)”,
“code”: “ERR_INVALID_ARG_TYPE”,
“stack”: [
“TypeError [ERR_INVALID_ARG_TYPE]: The “data” argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received type number (NaN)”,
" at Hmac.update (internal/crypto/hash.js:82:11)",
" at verifySignature (/var/task/index.js:26:91)",
" at Runtime.exports.handler (/var/task/index.js:33:8)",
" at Runtime.handleOnce (/var/runtime/Runtime.js:66:25)"
]
}