CORS Errors from localhost

Testing a client from the browser in localhost does not work for HTTP express and flask Things. I get `Access to fetch at 'http://plugfest.thingweb.io/http-express-calculator-simple/properties/result' from origin 'http://localhost:5173' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.`

The client is the nodewot browser bundle

There is no issue with data schema thing