So I made an inquiry about the site.
1.What’s the possible cause of the unsuccessful access attempt?
2.Where are they redirected to?
3.What are you supposed to do to stop these?
The answer I received is “Sorry, we can’t answer your question just from access analysis.” in short.
So sent another question saying “Where and how can I check that?”.
I am waiting for their answer now.
Normally, I receive a message on my e mail address when they reply, but I didn’t receive anything. I just logged into the site and found that the reply was there.