Here lies the core issue. ArcSoft Inc. shifted its focus away from consumer photo editing years ago. Their official activation servers have been shut down. Consequently, even if you have a valid licensed email and activation code, the "online activation" step will fail because the server is unreachable.
You have three paths forward:
If you encounter issues with your licensed email or activation code, here are some troubleshooting tips: arcsoft photostudio licensed email and activation code
However, if you have recently dusted off an old installation CD or purchased a vintage software key online, you have likely encountered a frustrating roadblock: the demand for a valid . Here lies the core issue