I’m sorry if this is the wrong avenue for this but I couldn’t find any web master support links.
On your web page at: https://theme.co/apex/forum/t/x-to-pro-conversion/104
you have a line that reads
First of all head over to your account page which you’ll find here814.
where the “here” test in that line is a link. Clicking that link results in landing on your 404 page.
Hope this is all you need. Let me know if I should report this elsewhere.
Bill