ERROR: [SDK_APP_COM_20000] error [error [Provided Custom query is invalid due to:[[Amazon](500310) Invalid operation: invalid input syntax for type date: "null";]]]
Smithy Server and Client Generator for TypeScript (Developer Preview) | AWS DevOps Blog
Quick Fix: Microsoft Flow Error - Invalid type. Expected String but got Null. - NETWORG Blog
Solved: Invalid type. Expected String but got Null - Power Platform Community
Validating Input Parameters in A Lambda Function | by Teri Radichel | Cloud Security | Medium