Customize homepage redirect when one user doesn't have access to the another one user

functions.php

$GLOBALS['um_custom_redirect'] = false;

function um_custom_pre_profile_shortcode( $args ) {
  global $um_custom_redirect;

	/**
	 * @var $mode
	 */
	extract( $args );

	if ( $mode == 'profile' ) {
		if ( UM()->fields()->editing ) {
			if ( um_get_requested_user() ) {
				if ( ! UM()->roles()->um_current_user_can( 'edit', um_get_requested_user() ) ) {
          $um_custom_redirect = true;					
				}
			}
		} else {
			if ( um_get_requested_user() ) {
				if ( ! um_can_view_profile( um_get_requested_user() ) && ! um_is_myprofile() ) {
					$um_custom_redirect = true;
				}
			} else {
				if ( ! is_user_logged_in() ) {
					$um_custom_redirect = true;
				}
			}
		}
	}
}
add_action( 'um_pre_profile_shortcode', 'um_custom_pre_profile_shortcode', 9, 1);

function um_customize_restrict_redirect( $url ) {
  global $um_custom_redirect;
  
  if ( ! empty( $um_custom_redirect ) ) {
    $url = '{your_custom_url_here}';
  }
  return $url;
}
add_filter( 'um_redirect_home_custom_url', 'um_customize_restrict_redirect', 10, 1 );