I think I broke my supervised classifier

[EvilLittleThing]

While I was learning to use the program I trained a supervised classifier and it worked, although badly because I was just doing a test run to see how it worked. So I got rid of it and tried again, except now I get errors when I try to use the classifier. Any advice on what I broke and how to fix it?

Unrecognized field name "SampleRate".

Error in CreateFocusSpectrogram (line 29)
rate = audioReader.audiodata.SampleRate;

Error in CreateClusteringData (line 112)
[I,wind,noverlap,nfft,rate,box,s,fr,ti,~,pow] = CreateFocusSpectrogram(Calls(i,:), handles, true, [], audioReader);

Error in SupervisedClassification_Callback (line 22)
[ClusteringData, Class, options.freqRange, options.maxDuration, options.spectrogram] = CreateClusteringData(handles, 'scale_duration', true, 'fixed_frequency', true);

Error in gui_mainfcn (line 95)
feval(varargin{:});

Error in DeepSqueak (line 29)
gui_mainfcn(gui_State, varargin{:});

Error in matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)DeepSqueak('SupervisedClassification_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating Menu Callback.

Error using save
' \ .mat' is a folder name. The FILENAME must be a valid file name.

Error in SeperateLong22s_Callback (line 154)
save(fullfile(PathName, FileName), 'Calls', 'audiodata', '-v7.3');

Error in gui_mainfcn (line 95)
feval(varargin{:});

Error in DeepSqueak (line 29)
gui_mainfcn(gui_State, varargin{:});

Error in matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)DeepSqueak('SeperateLong22s_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating Menu Callback.