QMLLS: QML Module not found even in most basic example

Mewo

I try to find the problem with linting. It cost me dozens of ours already in various projects to get linting working and it drives me crazy.

I have this minimum working example. It includes a Main.qml importing a Module and using the Type defined in it inside Type.qml.
qmlls is configured in QtCreator like this:
.
.qmlls.ini in imports/Module includes the following:

[General]
buildDir=/home/mewes/Projekte/MWEQmlImports/build/Desktop_Qt_6_8_1-Debug/imports
no-cmake-calls=false
docDir=/home/mewes/Qt/Docs/Qt-6.8.1
importPaths=

I use Qt 6.8.1.

I get the usual "Failed to import Module. Are your import paths set up properly?"
What am I doing wrong?
I reset the code model already.