Upgrade your browser to use Dropbox

Thank you for helps.

Please see the below that I took screenshot.

The versions of browsers are Chrome (89.0.4389.82) and Firefox (not sure but I just downloaded from that link)

 Thank you for the response.

The word in the middle of the picture provides the links of four browsers (edge, chrome, firefox and safari).

I actually updated the Windows 10 (new ones yesterday) and also re-installed the three browsers (edge, chrome and firefox) following the links. But still I receive the same error windows.

Any solution that you can suggest?

I saw my desktop (Dell XPS) has not been sold on the Dell webpage. Due to this, this promotion is not working, which is I am doubt.

I'm having the same problem. It started recently. I'm not a frequent user of dropbox so it is difficult to say when exactly it happened and after what. Approximately a month ago everything was fine. Since then I definitely updated Windows itself and Edge. I would guess that the error is triggered by an opposite, not because I have an old version of a browser but apparently I have a too new version.

   I hope my reply will be reported to the development team. This is clearly a bug in the browser identification code when displaying authorization page (https://www.dropbox.com/1/oauth2/authorize). Apparently it is very recent change. I display this page with the help of UWP WebView control, which is essentially an Edge Browser. I don't know why but that control identifies itself as this "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; WebView/3.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19042" and it is different from the regular Edge Browser. Also, I don't know what deems to be wrong with this line but because of that "upgrade your browser to use dropbox" is displayed. The regular Edge Browser on my system sends this header "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36 Edg/89.0.774.54". If I use this header in the WebView control, the authorization page is displayed but something is not working anyway. It always gives an error "There is a problem completing this request" when I click on "Sign in" button or even when I pause typing an e-mail or password. I would guess a side effect of captcha.

Finally, I guess, I got everything and apparently it is not a bug in the browser identifying but frankly speaking I didn't expect Edge 18 to become unsupported. IE is understandable but not Edge 18. What I learned is that UWP WebView running Edge 18 browser even though I have Edg 89 installed on my system. I expected WebView to use the latest installed engine but it was not true. Thus, I would like to ask, to continue supporting Edge 18, without it all UWP apps using WebView for authorization with Dropbox will break. So far I don't see a way how to use Dropbox web authorization from UWP.

Because my main browsers are Chrome and firefox, I tried to log in this promotion dropbox once I removed the Edge on the control panel. But it is not still working.

I am experiencing the exact same issue with the Webview control in UWP, specifically in Xamarin developing in the UWP environment. Unless and until Microsoft can update the Webview control, Dropbox needs to continue supporting Edge 18 or there is no way to use the Dropbox API to authenticate a user to use Dropbox in our app any longer. There is no way, that I have found, to use the external browser in UWP to authorize a user and retrieve the token from the external browser. This is a breaking change that Dropbox has inflicted.

I can not migrate to WinUI from UWP (which uses Edge 18 webview), because they do not support maps: Question: When is MapControl coming to WinUI 3.x? · Issue #3024 · microsoft/microsoft-ui-xaml (github.com)

Please revert this feature and wait at least one year until they implement all the missing features.