That message comes from Discord, not from Lootryx, and it is about the Discord account your browser is signed into rather than your Lootryx account. We only ask Discord for your username and email, so nothing we request needs a verified account.

If a private window works but your normal one does not, the two are signed into different Discord accounts. Open Discord in this browser, check which account it is, and look at User Settings → My Account for a “Verify Email” banner. Discord treats an account as unverified until its EMAIL is confirmed, which is separate from having a phone number on it.