csv DictReader Error

import os
from pathlib import Path
import csv

# Script for creating PDF Manuals

# Define your username
# Enter your Bergkamp username enclosed in single quotes.
# This is case-sensitive. It must exactly match the name of your USERS folder.
# Ex: 'melb'
username = 'libbyl'

# Define TempManuals path
tempmanuals_path = Path(r'F:/USERS/' + username + '/TempManuals')

# Set TempManuals path as current working directory
os.chdir(tempmanuals_path)

# Import Job Materials list to a dictionary
# Must exactly match name of csv file exported from Infor CSI
with open('ToExcel_JobMaterials.csv', 'r') as csvfile:
    job_materials = csv.DictReader(csvfile, delimiter='\t')

    for row in job_materials:
        print(row)