Saving vector tile generates an invalid redirect_url

[AlejandroPeq]

Hello first of all, I would like to say that this version 2 is great.
I was trying to generate a vector tile downloading mapstyler project and executing it on my web server.

The problem is that when I push on save button , I can see a new smaller browser window that says me invalid redirect_url instead of showing me the arcgis online login.

I supose that the problem is because of the proxy and the cliendid the app is currently using.
I tried to create a new app on my account and register it too to get a new cliendid. Then I used that cliend id and put it on portal.js

Finally as I can see, the proxy url should be pointing to your proxy url and not getting it from my current url, so I decided to force that url giving the following value "http://apps.esriuk.com/app/mapstyler/8/wmt"

Thats what I did with the first mapstyler version , and it worked. However, with this version definitely not.

So I decided to keep your client id and continue using your proxy url instead of getting it using "document.location.href" on image.js .... forgotting the idea of using my own app client id

It happens the same, and the message is talking about wrong authentication. I include the next picture using chrome dev tools analysing the network requests if it helps

Could you please tell me how can I solve this?

Again, great job with this new version, it's much better.

Regards