So the bit of the code where that error is raised is here in lib lib/apiauthaction.php if ($required && $this->auth_user instanceof User) { // By default, basic auth users have rw access $this->access = self::READ_WRITE; } elseif ($required) { $msg = sprintf( "basic auth nickname = %s", $this->auth_user_nickname ); $this->logAuthFailure($msg); // We must present WW…