Are you currently using a (v17, v19, etc.)?
If you're looking to use Zoom Player MAX, here are some general steps and information that might be helpful: zoom player max registration key verified
: Ensure your key matches the version you have installed. For example, a version 18 key may not work on version 19 unless you have an active Lifetime Upgrade Copy/Paste Errors Are you currently using a (v17, v19, etc