Cannot execute remote debugging

I can't execute the remote debugging of my application with QtCreator and CDB on Windows even if I followed all the steps reported in the Documentation. This is what I did on the server machine:

1. I installed the Debugging Tools for Windows and I have cdm.exe in the folder C:\Program Files (x86)\Windows Kits\10\Debuggers\x64.
2. I copied qtcreatorcdbext.dll (64 bit) from my PC's folder C:\Qt\Tools\QtCreator\lib\qtcreatorcdbext64 to the server's new folder C:\lib\qtcreatorcdbext64.
3. I set up the environment variable _NT_DEBUGGER_EXTENSION_PATH=C:\lib\qtcreatorcdbext64.
4. I added to the environment variable PATH the path C:\Program Files (x86)\Windows Kits\10\Debuggers\x64.
5. In the application folder from Powershell I ran the command: cdb.exe -server tcp:port=1234 .\Engine.exe
6. In my PC I started the debugging session by QtCreator from Debug/Start Debugging/Attach to Remote CDB session... specifying <serverIp>:1234 as Connection.

The connection was established but on the server side cdb.exe didn't find the library qtcreatorcdbext.dll.

Attached is the error output of the cdb.exe command.