EmailVerificationLink without apiKey

Hi, it's already two days I'm trying to send an email verification mail, but the link inside the mail doesn't contain a value for apiKey. That's why I'm receiving this message: "The selected page mode is invalid." by clicking the link from mail.

I also tried sending the email by api to the route: https://identitytoolkit.googleapis.com/v1/accounts:sendOobCode?key={apiKey}", but result is the same.:(

What can be wrong?

An example of link (I didn't hide anything except the project name):

m.authClient.EmailVerificationLink:
https://.firebaseapp.com/__/auth/action?mode=verifyEmail&oobCode=JoNSiRpM6LhrjleFEfJKPbqti9arNkTCUkeiyYD541AAAAGMvAETVw&apiKey=&lang=en

m.authClient.EmailVerificationLinkWithSettings:
https://.firebaseapp.com/__/auth/action?mode=verifyEmail&oobCode=DJFO3hiveuX7lv25BzQ7Pyfd4POblJ1Nury5EquhESwAAAGMvAKOlQ&apiKey=&lang=en