Hey, I had issue with ts-node missing and then following error: Invalid options object. Dev Server has been initialized using an options object that does not match the API schema. - options.allowedHosts[0] should be a non-empty string it was simply adding following code to package.json to make the issue fixed: "options" : { "allowedHosts" : [ "localhost" , ".localhost" ], "proxy" : "your localhost:port address" } I could not add link to proxy as a new user