I did notice that the Packet Sender image that you sent used a different IP address from the instructional video (192.168.10.1 instead of 127.0.0.1) and your image indicated that you were sending via ‘TCP’ instead of ‘UDP’. I am not sure if that is the issue or not (again I am not an instructor). Here is an image from the instructional video, in case it is helpful:
Thank you so much! I did notice that I had TCP instead of UDP that last time through. I think I’ve come to the conclusion that my school network is blocking it. I tried it on my personal laptop and it worked just fine. Thank you for your help!