From your other posts, Monica, we now see that you had someone else do your upgrade from 2.9.3 to 3.6.2. You are not being "mean," and neither am I. In the computer world, many upgrades have "requirements" that must be met, and procedures too, before the upgrade will work. For example, you cannot run 64-bit software on a 16-bit computer... it just won't work. With every release of Moodle, one can read about the requirements. If they are not "honored" Moodle might not work correctly, or some features might not work.
So what you have been trying to say is "I didn't do anything. I just upgraded from 2.9 to 3.6. I didn't do anything, and now Moodle is giving me problems." Don't you see that you did do something? (Well, maybe you are correct that you didn't personally upgrade your Moodle, but someone else did.)
Yes, anyone can post bugs. I have no clue what you mean by "bug report was denied." Do you mean that: 1) you couldn't log in to Tracker, 2) you couldn't create a tracker item, 3) you created a tracker item and it was removed, or 4) you created a tracker item, but it was closed?
I have never seen a Tracker item tagged as "Denied," but I haven't seen everything so, maybe so.
Also, if someone doesn't upgrade moodle correctly and breaks something, this is not a bug. The first step is to convince folks that the upgrade was correctly done.