Dropbox oauth window is not working

Question

I'm porting my application to Electron and I was surprised to find out that the Dropbox authentication doesn't work in this environment. It does work in Chrome though.

The sign-in buttons remain disabled and the labels appear over the inputs.

The following message is displayed in the console:

The Content-Security-Policy directive 'worker-src' is implemented behind a flag which is currently disabled.

I'm testing using [email protected], [email protected] on OS X.

I found a similar question, but it seems to use a different version of Electron and has a different error message:

Dropbox oauth view is not rendering properly

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Update:

The Content-Security-Policy message seems to be related to the Chrome version. The worker-src directive was introduced in Chrome 59 and [email protected] is shipped with Chrome 58.

https://www.chromestatus.com/feature/5922594955984896

I've tested with [email protected] that comes with Chrome 59, and the console messages are gone. But the problem with the auth page remains.