Problem with xcode build

I have an error when I try to build with xcode

It’s my first project. Can anyone help me?

The fact that it is not recognizing the base class that’s inside the juce namespace, makes me guess that Xcode it’s not able to find the .h files for the JUCE module where it is defined.

Is this project generated with ProJucer? if so, check that the path to juce modules correctly points to the “modules” directory inside your JUCE directory, then regenerate the project.

What exact “path” setting to adjust, depends on whether you have a global path for your juce modules, or if you have defined one custom such path for your project