Restrict login for some role

@narekmarkosyan

You can try this code snippet refusing Administrators to Login
and redirect them to the Home page.

You can redirect to another page by replacing home_url() with an URL within quotes.

add_action( 'um_submit_form_errors_hook_login', 'custom_submit_form_errors_hook_login', 10, 1 );

function custom_submit_form_errors_hook_login( $args ) {

    if ( UM()->user()->get_role() == 'administrator' ) {
        exit( wp_redirect( home_url() ) );
    }
}

Install the code snippet into your active theme’s functions.php file
or use the “Code Snippets” plugin.