Debugger does not start for an Android Qt-app (Windows 7 64-bit, QtCreator 4.15.1, Qt 5.15.2)

Solution for Debugger does not start for an Android Qt-app (Windows 7 64-bit, QtCreator 4.15.1, Qt 5.15.2)
is Given Below:

I have a simple Qt-based (QtQuick) app for Android. The app is built with QtCreator, deployed to an emulator and runs there perfectly. Moreover, I able to debug the app from command line with GDB (QtCreator injects gdbserver to the app bundle).

However, the debugging from QtCreator itself with the same GDB is not possible; it even does not reach the stage of connecting to gdbserver through forwarded port. In the QtCreator’s debugger log I see messages like this:

>&"show version2show debug-file-directoryn"
>&"Undefined show command: "version2show debug-file-directory".  Try "help show".n"
>1^error,msg="Undefined show command: "version2show debug-file-directory".  Try "help show"."
dPARSING VERSION: 1^error,data={msg="Undefined show command: "version2show debug-file-directory".  Try "help show"."}

It looks that 2 consequitive commands:

1show version
2show debug-file-directory

were concatenated wrongly (new line character after the first command was discarded). What does the reason might be?

Note: In a Linux the same versions of QtCreator/Qt work fine.

Thanks!