Invalid Redirect on new plugin

[GonzaloQSystra]

As stated. Newest version of the plugin gives an invalid token access key url. Opening the 5.3 version of my project gives no errors, but 5.5 does

[GhisBntly]

Hello,
There were no changes in the last three plugin versions that could affect the redirect_uri, as these releases were strictly limited to small bug fixes.
Since 0.1.19 (UE 5.5), the default port used in the plugin is back to 3000 (and no longer 33569 which was an earlier mistake).
You can now change the port by setting the AuthRedirectUriPort property of your AITwinAppIdHelper actor.
The host should no longer be localhost but 127.0.0.1. I don't think it would work now with localhost.
What are you using for redirect URI?

Can you check the suggestions from https://github.com/iTwin/itwin-unreal-plugin/tree/main/Documentation/ForDevelopers#error-401-unauthorized-or-403-forbidden to see if something works, like clearing the DAT files, logging out and back again?
Hope this helps,

[GonzaloQSystra]

The URI in the Itwin App is http://localhost:3000/signin-callback
The AuthRedirect in the AppIdHelper is 3000

Should I be changing the URI to a different link?

[GonzaloQSystra]

Furthermore, Opening the 5.3.2 version of the same project causes the Redirect to work just fine. When I try the identical process in 5.5 it gives me error 400.

Opening 5.3.2, getting the opening redirect from that project, then changing to the 5.5 Project actually makes the authorization key work, dont know why

[GhisBntly]

I'm surprised it works in 5.3 with localhost, I thought the requirement for 127.0.0.1 would apply to all Unreal versions!

[GonzaloQSystra]

So how does this fix, do i now have to use http://127.0.0.1:3000/signin-callback as the URI for the Itwin App?

[GhisBntly]

Yes I think that would be the correct URI. I don't know why it worked so far with UE 5.5 (if it did) 🤔