After some research, your issue appears unrelated to the other ones.
Your Secret Word should be letters and numbers only, no spaces, punctuation nor other symbols. Make sure you don't accidentally have a space before or after your Secret Word anywhere. If they won't accept the Approved URL we document, try it with https:// instead of http:// like so:
https://www.e-junkie.com/2co/YOURSECRET_WORD/download.php
Let us know if that works, so we can update our documentation accordingly.