Because you likely used a key found on a "free product key" website. Kingsoft updates its blacklist every month.
Instead of risking your computer’s security with illegal keys, consider these legitimate ways to use WPS Office effectively without paying:
No product key required. The WPS Office mobile app is significantly more generous than the desktop version. On your phone or tablet: product key wps office free
Pro Tip: If you sign up for the WPS Premium trial on mobile (usually 1 week free), you get the Pro features, then cancel immediately. You keep some tier-2 features.
The short answer: No. Not legally.
Scour any forum (Reddit, Quora, or key-sharing websites), and you will find lists of codes claiming to be "WPS Office 2022 Product Key Free" or "WPS Office Pro Activation Key." Examples you might see include:
These codes fall into three categories:
Warning: Using a cracked product key violates WPS Office's Terms of Service. Kingsoft has automated systems that disable bootleg licenses, removing your Pro features without warning.