I cannot activate windows 11 pro in my device after reset device & reinstall windows. how can i fixed this problem?

The message suggests a Volume licence in use. (this is not valid for a personal user) Open Command prompt (Admin) and enter slmgr /dlv [press return]

Post a screenshot of the result. (note there is no sensitive info in the screenshot)

Hello,

This means you are using a volume license the KMS type. This type of license is for organization users only. Organizational users are required to connect to the organization's KMS server to validate license every few years to stay activated. If you are not a organizational user, you shouldn't be using this type of license. It is considered a violation of licensing terms. If you are an organization user, contact your work IT regarding how to connect to their KMS server.

You can type cmd in the search on the taskbar and hit enter to launch command prompt, then run the following command:

slmgr /dlv

A pop up window will show you some details about your license. You can see if you mention volume license KMS somewhere.

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Launch Powershell (note, it is not Command Prompt, but Powershell), and run this code to see if you have an OEM license on the motherboard.

(Get-CimInstance -ClassName SoftwareLicensingService -Property OA3xOriginalProductKey).OA3xOriginalProductKey

If it returns a key, then you can clean install Windows Home edition to go back to be properly licensed.