Error: access

I'm trying to connect a phone via qr code using your guide:
https://github.com/XRPL-Labs/XummPkce/blob/main/sample/index.html
and everything works for you.

write in my application
provider = new XummPkce(xummApiKey);
provider.authorize()

where xummApiKey i got, after api registration in xumm dev console

and it gives me an error:
Error: access_denied
Invalid client/redirect URL.

Can you please tell me what can I be missing?

also repeated all the steps from here https://xumm.readme.io/discuss/62af82ada6faf1007c0e89f3

also I tried other approaches: XummSdkJwt , xApp. And they simply cannot join the server.
scanQr response: xApp.scanQr: could not contact Xumm App Host
POST https://xumm.app/api/v1/jwt/payload 500