Hi @Mounir BEGHDADI ,
1, It's recommended to download latest baseline version 2203 from Configuration Manager (Current Branch) Trial (microsoft.com).
INFO: WinHttpQueryHeaders() in Download() returned Not Found (404)
2, There is a 404 issue during downloading, this is very similar to a thread below.
Prereq download 404 error when installing Primary Site - Microsoft Q&A
3, Since October 2019, Configuration Manager is part of Microsoft Endpoint Manager. This article for your reference:
Microsoft Endpoint Configuration Manager FAQ - Configuration Manager | Microsoft Learn
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Thanks for your time.
Best regards,
Cherry