Web AppBuilder for ARCGIS unknown error : [TypeError: must start with number, buffer, array or string]

Question

I am trying to log in my arcgis web appbuilder version 2.5 but its getting failed by showing some error ([TypeError: must start with number, buffer, array or string]) in my terminal. see below image..

When I log in using arcgis web appbuilder version 2.3. Its successful.

Answer 1

I think this may be an issue with your OS and Node.js version not jiving with the npm package versions that the proxy server is using (see server/package.json) - I would recommend opening an issue with Esri Support to try to get to the bottom of the specific issue.