now I made appeard the login button going to forum>settings>members and changing the custom authorization URL and then going to apparience>menu and changing the custom menu to the same link as showed.  Before when the menu login button didn´t appear it was in both places as /foro/%wpforo-login%/ and now only /%wpforo-login%/ .

The issue now is that when I click the login button it takes me to a Bad Request page, error 400.

Can anyone help me here? Thanks!!

I finally could fix going to Dashboard > Forums > Settings > Members admin page and delete all custom URLs as shown, according to the topic answered by Robert https://wpforo.com/community/wpforo-integration/login-404-erorr-and-register-erorr/#post-19663 THANKS!