Cannot create Lambda function

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.

• Try to create lambda function through CLI. Refer AWS CLI Command Reference 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. 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.

Hope this helps.

Comment here how it goes, happy to assist.

Abhishek