I installed the latest version of [the QtProject](http://qt-project.org) so now I can debug `C++` code. 

While trying to debug for the first time I got this error:

```
ptrace: Operation not permitted.

Could not attach to the process. Make sure no other debugger traces this process.
Check the settings of
/proc/sys/kernel/yama/ptrace_scope
For more details, see /etc/sysctl.d/10-ptrace.conf

```