What is the URL for calling the Test Suite Through the REST API?

I tried the following:

• https://{YOUR_ENVIRONMENT_HOST}/BDDFramework/rest/v1/BDDTestRunner/{TestESpace}/{TestSuiteScreen}
• https://{YOUR_ENVIRONMENT_HOST}/TestRunner_API/rest/v1/BDDTestRunner/{TestESpace}/{TestSuiteScreen}

...but both of them return the same error message:

"ErrorMessage": "Unable to call TestSuite screen '{TestSuiteScreen}' for eSpace '{TestESpace}'. Exception: Failed to launch browser! path to executable does not exist"}

Am I doing something wrong?

Many thanks!

P.S. Of course I have replaced the {parameters} with the correct values...