Uppy authentication no popup

I try to use Puppy with Google and Dropbox. I run a local Companion server to test. When select Google/Dropbox source, a new windows for authentication it opens. After my authentication the window redirect to Companion server Uri and never close it and no return any result to parent window.
When I test it with Uppy sample on Uppy website always open a popup window for authentication.
I supose the issue is because in my sample case always open a new window and not a popup.
Can any help me?
Thanks in advance

I resolved it. It was a CORS problem. I needed to server the sample client page from a server to do the requests to Companion (and allow this location host).

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