404 Error while login

When i click login with facebook button in my account page : it shows a error 404 page not found. but the login works in wp-login page.
In my account page the url after i click login with facebook is : https://www.example.com/wp-login.php?loginFacebook=1&redirect=https://www.example.com/my-account/
this shows page not found but when i edit the url to https://www.example.com/wp-login.php?loginFacebook=1 this only this logins !!! lease solve this as i am getting this error for both google and facebook login