AWS Lambda中的下拉列表中不提供Alexa Skills Kit触发器

I'm trying to build a simple AWS Lambda function that is triggered by the Alexa Skills Kit. I am following an Amazon made tutorial on creating the skill, etc. Unfortunately, Alexa Skills Kit is not an option on the drop down menu for the "Configure Triggers" window. I've attached a photo of what is available.I'm trying to build a simple AWS Lambda functio