Type tParams = Assure; export default async perform Obstacle( params : params: tParams ) const slug = await params; const productID = slug[1]; // other code here It seems like the type for params is resulting in problems, quite possibly since Subsequent.js expects a unique construction for params. Essentially the https://alphawireless.com/future-proofing-american-utilities-why-900-mhz-is-critical-for-utility-communications/