QML profiler not working

Steps to reproduce:

• Install Boot to Qt toolchain (6.8.0 used) and Qt C 15.0.0 beta1

• do the usual device setup stuff and enable debugging/profiling from QtC Projects -> Build Settings

• open a Qt Quick application or create one with the Application Wizard

• start profiling

Expected result:

Profiler starts and no errors are shown

Actual result:

Profiling does not start and an error dialog saying: "Could not connect to the in-process QML profiler within 2s. Do you want to retry and wait 4 s?"

If one presses 'Retry' immediately a new dialog is shown (before the 4 s has passed) and one can click the dialog so often that the numbers in retry in x secs turn to have minus in front and ultimately the dialog says: "Could not connect to in-process QML profiler in 0 s. Do you want to retry and wait 0 s?"

Not host specific. Can be reproduced on Windows, Linux and macOS with Boot to Qt (6.8.0) toolchain.