If you are trying to import a Lex bot from a different account, you will encounter this error. Lex can’t access the Lambda function arn:xxxx:function:bot-api in the context of intent arn:xxxxx:OpenOrderAmount:$LATEST. Check the resource based policy on the function and try your request again. I tried replacing the correct ARN id of the function in the target environment but that won’t work. Lex tries to give execution permission when attaching a function to the fulfillment but it doesn’t do it while importing. I hope someday the AWS Lex wakes up and makes this process simple. Until then, here is a solution