Ionic User calls fail and returns HTTP 400 error

Hey guys,

I’m running into an issue where it seems that calls to the Ionic platform (specifically Ionic User) are returning HTTP 400 errors. I don’t recall this happening before, and calls fail in both the iOS simulator/device and in-browser, so I don’t think it’s Chrome’s CORS bug. I also haven’t touched any of the code that I use to call Ionic User, so I’m not really sure what’s going on. That end of things is pretty vanilla.

Here’s the error that Safari’s inspector returns:

[Error] Failed to load resource: the server responded with a status of 400 (BAD REQUEST) (identify, line 0),

Ionic User: – Error: Request Failed with status code of 400,


Ionic User: Error: CORS request rejected:…)

XMLHttpRequest cannot load Response to preflight request doesn't pass access control check: The 'Access-Control-Allow-Origin' header contains multiple values ', *', but only one is allowed. Origin 'http://localhost:8100' is therefore not allowed access.

This occurs upon any call to Ionic User, and depending on the situation it can cause the app to not load at all on-device. It also happens on all devices, in iOS simulator, and in the browser, and only whenever I call Ionic User’s save() method.

Any help would be appreciated. Thanks!!

1 Like

Hello @brewedandbattered, had this problem when I was trying to get the ID for the User of the Int type and must be String…

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@clistenes its true, for me it was the same, I changed my own id to string and now is working!