Gitea Oauth not working on Linux

Version

2.4.1

Operating system

Linux

OS version or distribution

Ubuntu 22.04 fresh install

Git hosting provider(s)

Other - please describe below

Other hosting provider

Gitea

(Azure DevOps only) What format is your remote URL?

None

Can you access the remote repository directly in the browser?

Yes, I can access the repository

Expected behavior

Prompt for loging

Actual behavior

Enter basic credentials for 'https://....'

Logs

03:35:08.053205 git.c:455               trace: built-in: git credential-cache get
03:35:08.055785 .../HostProvider.cs:131 trace: [GetCredentialAsync] No existing credentials found.
03:35:08.055797 .../HostProvider.cs:134 trace: [GetCredentialAsync] Creating new credential...
03:35:08.057616 ...ricOAuthConfig.cs:38 trace: [TryGet] Invalid OAuth configuration - missing/invalid authorize endpoint: 
03:35:08.057831 ...cHostProvider.cs:104 trace: [GenerateCredentialAsync] Skipping check for Windows Integrated Authentication on Linux.
03:35:08.057842 ...cHostProvider.cs:113 trace: [GenerateCredentialAsync] Prompting for basic credentials...

Reproduce the OAuth failure with Gitea on Ubuntu 22.04 and review the credential flow in HostProvider.cs and the OAuthConfig.cs path shown in the logs. Trace why the OAuth configuration is rejected, then verify that the flow prompts for OAuth login rather than basic credentials.