Cannot Create Character - Immediate Disconnect at Character List on All Realms

I am experiencing a persistent issue when trying to create my first character on the Onyxia (x1) realm.

Problem Description:

1. I can log into my account successfully.
2. I select the "Onyxia" realm.
3. The screen loads to the Character List (where it shows "Create" and "Cancel").
4. Within 1-2 seconds, I am instantly disconnected with the message: "You have been disconnected from the server."
5. This happens consistently, 100% of the time. I cannot proceed to the character creation screen.

Troubleshooting Steps I Have Already Taken:

· ✅ Completely cleared the Cache folder.
· ✅ Removed all AddOns (renamed Interface and WTF folders).
· ✅ Verified and set the correct realmlist.wtf to set realmlist logon.warmane.com.
· ✅ Flushed DNS and changed to Google DNS (8.8.8.8 and 8.8.4.4).
· ✅ Tried switching to other realms (like Lordaeron) and then back to Onyxia.
· ✅ Restarted my router and computer.
· ✅ The issue is specific to Onyxia. Other realms seem to load fine (if I can get past the list).

My Connection Details:

· I am connecting from Iran. There might be ISP-related blocking.
· I have NOT yet tried a VPN, as I wanted to report the native issue first.

Request:
Could you please investigate this issue from the server side? Specifically, if there is any block or bug preventing new character creation on Onyxia for accounts from my region.

Thank you for your time and assistance.