If the window does not pop up to accept the transaction on the old one, it is recommended to try to hard refresh on the old UI (command+shift+r). This should clear any cached data that might be preventing the window from popping up. If this does not resolve the issue, it is possible that the transaction may be blocked by the system due to security measures. In this case, it is best to contact the system administrator or the tech support team to investigate the issue further and resolve it.