Cannot create Lambda function

Question

I login go to Services -> Compute -> Lambda and then instantly get a "UnknownError" notification.

If I go to the Lambda Dashboard then click Create Function button, fill out my settings (trying Python 3.11) then click create function and get error "UnknownError" again!

How do I find out what UnknownError is? Has this error been coded like this to make me pay for support?

Does anyone know how to create a simple Lambda function without getting "UnknownError" ?

EDIT: I am logging in as an admin IAM user & also tried as root, both have the same issue.

Thank you.

Answer

I'd start isolating this issue by following steps:

- Go to cloudtrail console and see if this failed attempt is being logged in cloudtrail and what's the error if logged. Attaching snapshot for your reference to search create lambda function APIs.

![Enter image description here](/media/postImages/original/IMK-W3M8wHTheN4Iryu3U5nA)

- Try to create lambda function through CLI. Refer [AWS CLI Command Reference](https://docs.aws.amazon.com/cli/latest/reference/lambda/create-function.html) for same.

- Also, I understand that you are not able to create lambda function, can you try too list functions through CLI as below. I would do so, just to make sure this is not a console issue as there might be lambda function already created it's just console is not rendering appropriately:

aws lambda list-functions

If none of these works, certainly there is something specific to your AWS account and you may need to reach out to [AWS Support](https://docs.aws.amazon.com/awssupport/latest/user/case-management.html). If this account is recently created, you may want to give it sometime to get this error auto resolved.

**Additional Reference:**

If you are not familiar with AWS CLI, here is the [Configure the AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-configure.html).

Hope this helps.

Comment here how it goes, happy to assist.

Abhishek

Cannot create Lambda function

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