Doesn't work – confusing instructions

[realpixelcode]

How to use Face Depixelizer properly? The instructions tell me to click on the "Let's Rock!" button but every time I get the error:

MessageError                              Traceback (most recent call last)
<ipython-input-7-af0d780e3ec8> in <module>()
     46   get_ipython().system('rm -rf /content/pulse/input/face.png')
     47   clear_output()
---> 48   uploaded = files.upload()
     49   for fn in uploaded.keys():
     50     print('User uploaded file "{name}" with length {length} bytes'.format(

2 frames
/usr/local/lib/python3.6/dist-packages/google/colab/_message.py in read_reply_from_input(message_id, timeout_sec)
    104         reply.get('colab_msg_id') == message_id):
    105       if 'error' in reply:
--> 106         raise MessageError(reply['error'])
    107       return reply.get('data', None)
    108 

MessageError: TypeError: Cannot read property '_uploadFiles' of undefined

Why is the "Choose a file" button deactivated? Is it a problem regarding the daily limit?

[woctezuma]

Click here.

If this box is ticked:

Then you will see an upload button:

Upload your image. Once the program has finished running, you will see something like this:

Click here to download the image:

[realpixelcode]

Well, when I click "Run", I do see an upload button but it is always deactivated.

[tg-bomze]

@realpixelcode

[realpixelcode]

@tg-bomze
I tried it over and over again (minimum 20 times) but it keeps failing.