[vecturn]

@prashantvatsh that doesn’t answer my question, I want to know how to still use it as a child page?

[vecturn]

Why does no one know how to fix this???

[vecturn]

If I don’t get a response I’m just giving up on Buddypress and moving over to the alternative Peepso

[vecturn]

Really could use some help because no one can signup to my site.

[vecturn]

Nobody knows?

[vecturn]

Here’s my solution, bit easier:

function blockode_custom_username_validate( $result ) {
  $error_name = $result[ 'errors' ]->get_error_message( 'user_name' );
  if ( ! empty ( $error_name ) 
      && !preg_match( '/[^_a-zA-Z0-9]/', $result['user_name'] ) 
  ) {
    unset ( $result[ 'errors' ]->errors[ 'user_name' ] );
    return $result;
  }
  else {
    return $result;
  }
}
add_filter( 'wpmu_validate_user_signup', 'blockode_custom_username_validate' );

[vecturn]

That doesn’t help me at all, it only forces specific characters inside the username it doesn’t actually allow the option of them.