Django: установка DEBUG = False вызывает ошибку сервера (500)

шаблоны работают, когда DEBUG = True, но изменение на False дает ошибку сервера (500) я использовал django 3.2.8

Это файл views.py

def test(request):
context = {}
if request.method == "POST":
    uploaded_file = request.FILES['document']
    print(uploaded_file)
    if uploaded_file.name.endswith('.csv'):
        #save file in media folder
        savefile = FileSystemStorage()
        name = savefile.save(uploaded_file.name, uploaded_file) #name of the file
        #know where to save file
        d = os.getcwd() #current directory of the project
        file_directory = d + '\media\\' + name
        readfile(file_directory)
        return redirect(results)
    else:
         messages.warning(request, 'File was not uploaded. Please use csv or xlsx file extension!')

return render(request, 'test.html', {})

#project.csv def readfile(filename): global rows, columns, data, my_file, missing_values, mydict, dhead, dtail, dinfo, ddesc, dcor, graph, dheat

my_file = pd.read_csv(filename, engine='python', index_col = False, sep='[: ; , | -]', error_bad_lines=False)
data = pd.DataFrame(data=my_file)
#my_file= read_file(filename)

data = pd.DataFrame(data=my_file)

mydict = {

    
    "data ": data.to_html(),
    
}

#rows and columns
rows = len(data.axes[0])
columns = len(data.axes[1])

#find missing data
missingsings = ['?','0','--']
null_data = data[data.isnull().any(axis=1)]
missing_values = len(null_data)

def results(request):

    message = 'I found ' +  str(rows) + ' rows and ' + str(columns) + ' columns. Missing data are: ' + str(missing_values)
    #message = info
    messages.warning(request, message)

    return render(request, 'results.html', context = mydict)

Это файл settings.py

DEBUG_PROPAGATE_EXCEPTIONS = True