What gameplay feature is this bug affecting?
Den ''edit your details'' box

What's the issue? Please include any error messages you receive and as much detail as possible.
COMPUTER info:

Operating system - Windows 10 Pro / Version 21H2 / Installed on 2021-01-09 (will provide more info if needed)

Browser: Up-to-date Chrome 111 on Windows 10 (it doesn't seem to give me the version like in the screenshot shared by you guys so I'm guessing it's because I'm up to date? I shared the link to that page if ever)


PHONE info:

Device: Google Pixel 2

Operating system: Android version 11 (can't update anymore)

Browser: Up-to-date Chrome 111 (no version stated like on computer)


THE ISSUE:

I tried to switch Territory Tile to ''plains'' in the Edit your details box under the Den section and hit ''Save''. The page sent me at the top of the page with a message error as follows: ''That email is not valid''.

I did NOT touch my email whatsoever. I know it's an unconventional email but I can even verify it with you if needed. It is in fact a working email and the same one I signed up with a couple of days ago. I never changed my email or touched that section since I signed up.

I don't remember whether I tried to do that on my phone or computer but either way, after that error, I for fun tried to ''Save'' without editing anything and got the same error both on my phone AND computer so I doubt my device is to blame.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
Here's the link I have to my den page if it's useful: https://www.lioden.com/territory.php

Link to my browser info: https://whatismybrowser.com/w/YMLGSF5

Any screenshots you can provide us with?
Yes, but I don't know how to add it. I'm a bit new to the platform. It's a screenshot of the error message so nothing huge but if needed just explain to me how qwq.

I tried copy-pasting it here or dragging and dropping it and it doesn't work. It's the first time i report anything of the sort so do correct me if anything is wrong.

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
1. Open ''Den'' section

2. Scrolled down to the ''Edit your details'' box

3. Opened the list of ''Territory Tile'' to select a new one

4. Chose ''Plains''

5. Hit the ''Save'' button

6. Sent back to the top of the page with a message error as follow ''That email is not valid'' In a red box appearing right between ''Ozora's den'' and the comment section.

7. Tried to ''Save'' without changing anything and got the same error both on my phone and computer. Both use google chrome.

*I never touched the Email section and or changed that email since I signed up a couple of days ago.