GET https://myqliksite/api/v1/csrf-token net::ERR_NAME_NOT_RESOLVED
This error suggests that the application cannot grab the CSRF Token from your Qlik SASS instance. Either your site url is incorrect or the web integration id is not set up correctly.
index.es.ts:1 WebSocket connection to 'wss://...' failed:
This error suggests that your application id does not exist. Please review this in src/settings.js.