SandBox_CppUTest_tests permission denied

[Martina Becchio]

Hello, I'm having trouble running the tests for the LED Driver code from the Test-Driven Development for Embedded C book. 

I have installed CppUTest using Ubuntu on WSL by following the steps on the website and I can correctly run the tests in the starter project https://github.com/jwgrenning/cpputest-starter-project

I have then downloaded the latest version of the book code. Here is my output when I run make in the code directory.

However when I move into the SandBox directory to run the tests for the initial LED Driver code in chapter three, this is what I get: 

Am I missing some steps here that I should follow to be able to rune these tests?

Thank you.