unspecified errors preventing android build

[kgregory]

So I'm getting these mysterious warnings about "mapping new <...> to old <...>", I have no idea what that's about. The thing that's even weirder is that sometimes I can just ignore these and other times some portion of them will be followed by an error with no description (see second screenshot with 3 un-described errors).

I've found that sometimes, if I re-start creator, clean all, run qmake, and then build, that I can get a successful build. These will usually come back, though, on the second or third build attempt. What is going on here?

Qt Creator 11.0.2, Qt 6.4.3 (kit is using Qt 6.2.3)

C:\Users\me\Documents\QtApps\bootloader.cpp:175: warning: unused parameter 'd' [-Wunused-parameter]
..\QtApps\bootloader.cpp:175:71: warning: unused parameter 'd' [-Wunused-parameter]
void bootloader::confirmedDescriptorWrite(const QLowEnergyDescriptor &d, const QByteArray &value)
                                                                      ^
:-1: warning: Warning: QML import could not be resolved in any of the import paths: QtQuick.Controls.Windows
Warning: QML import could not be resolved in any of the import paths: QtQuick.Controls.macOS
Warning: QML import could not be resolved in any of the import paths: ghozt.colorbackend

:-1: warning: Warning: Mapping new ns http://schemas.android.com/repository/android/common/02 to old ns http://schemas.android.com/repository/android/common/01

:-1: warning: Warning: Mapping new ns http://schemas.android.com/repository/android/generic/02 to old ns http://schemas.android.com/repository/android/generic/01

:-1: warning: Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/02 to old ns http://schemas.android.com/sdk/android/repo/addon2/01

:-1: warning: Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/03 to old ns http://schemas.android.com/sdk/android/repo/addon2/01
:-1: error: 

:-1: warning: Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/02 to old ns http://schemas.android.com/sdk/android/repo/repository2/01
:-1: error: 

:-1: warning: Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/03 to old ns http://schemas.android.com/sdk/android/repo/repository2/01
:-1: error: 

:-1: warning: Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/03 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01

:-1: warning: Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/02 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01

:-1: warning: Warning: unexpected element (uri:"", local:"extension-level"). Expected elements are <{}codename>,<{}layoutlib>,<{}api-level>
Warning: unexpected element (uri:"", local:"base-extension"). Expected elements are <{}codename>,<{}layoutlib>,<{}api-level>