1. Are you using an Android device to create your pattern?
2. Are you trying to create a pattern on the screen or a .pdf?
3. What happens when you click on "Let's see my pattern"?

I have seen in a couple versions of Android where the upload file name does not show or shows up and disappears.  I'll fix that but it still works even though you may not see the file name.

I just tested it again on my Android phone and selected an image stored on the phone.  In section 7 I selected .pdf pattern output and "Download Pattern".  There was a slight delay when I clicked on "Let's see my pattern" but then the phone popped up with a message telling me I just downloaded a file and allowed me to view my pattern through my .pdf file viewer app.

If you can let me know the answers to the above 3 questions, it will give me a starting point to help.

Terry