qt6.7.2 network get "The credentials were not recognized"

https://forum.qt.io/topic/158517/qt6-7-2-network-get-the-credentials-were-not-recognized

I have a problem.If i use openssl instead of schannel,the problem can be solved.But i think it is bug for qt,it should be solve in schannel.
I use qt http example code run in win10,which is first installed,no patched installed,it happen.The code works fine in my compiled environment.

the example code is :\qt-everywhere-src-6.7.2\qtbase\examples\network\http
I find the problem code in qtls_schannel.cpp:1179
the function AcquireCredentialsHandle return SEC_E_UNKNOWN_CREDENTIALS.
But it work fine in qt6.2.4.There are differences between the two codes.I don't know which change caused the problem.