MATLAB: Error using <<MEXMACI 64 FILE>> Failed to open file

Question

I am trying to use the Edf2Mat toolbox. https://github.com/uzh/edf-converter

MATLAB is giving me an error message whenever I try to run the main function, Edf2Mat().

There is an MATLAB Mex file that is not working: edfimporter_pre11.mexmaci64

This is the error message:

Error using edfimporter_pre11
Failed to open file.

Error in Edf2Mat>@(varargin)edfimporter_pre11(varargin{:}) (line 362)
                       importer = @(varargin)edfimporter_pre11(varargin{:});

Error in Edf2Mat/processFile (line 365)
                obj.RawEdf      = importer(obj.filename);

Error in Edf2Mat (line 313)
                obj.processFile();

I assume the last 3 error messages are not worth looking into until I can get MATLAB to open edfimporter_pre11. I can't open it myself, I get the error: Error using open (line 146), in an alert window.

Anyone have experience with this toolbox, or that can see what issue is from a bird's eye view?

Thanks!

P.S. I am running this on a Mac, but I also tried on a PC. Same error.