Nucleo-F411RE debugs running OS_6.8.0 but not OS_6.14.0

Hi

Operating system: Windows 10
Mbed Studio 1.4.1
Example program: mbed-os-example-blinky

I create a program with Mbed Studio - File - New program menu structure and the default OS version is 6.8.0. It is possible to compile in DEBUG mode and run the program in debugger mode.

Then make a duplicate of the program and update the OS to version 6.14.0. I can then only compile the program and run it. Running the program in DEBUG mode option is not enabled.

It seems that updating the OS from 6.8.0 to 6.14.0 breaks the debugger. How do I get he debugger running again? As the Nucleo-F411RE is one of the official platforms that are DEBUG supported as found in the documentation, one would assume that after updating the OS it should still work.

Regards

Roco