Allowing the user to control the receiver from their handheld device. File Sharing:

: EShare utilizes cloud-based verification. If multiple devices attempt to use a cloned or leaked license key, the EShare servers will permanently blacklist that hardware signature.

Searching for a “working” eShare Pro license key outside of official channels is a gamble with poor odds. You risk:

To help me provide more specific steps, what (e.g., ViewSonic board, Android TV box) are you installing EShare Pro on, and what specific error message are you seeing? Share public link