Here is the reason why my Devex request was rejected twice.
And when I sent an email asking for the detailed reason, I received the following response:
It is stated here that I was sent a link for a Tipalti registration, but I never received such an email. I even checked my spam and junk folders, but no link was ever sent to me, despite checking multiple times.
I preferred to use DevForum because the emails I sent were not responded to quickly. Thank you in advance for your help.