License error: Unity License return request has timed out. Please verify that you are connected to the Internet and/or try again later.

Symptoms

• When I try to return my activations through the Unity Editor, I receive the error, "Unity License return request has timed out. Please verify that you are connected to the Internet and/or try again later."

Cause
If you have accents or other special characters in your computer name, this can prevent Unity from managing the activations properly.

Resolution

Check your computer name for any accents or characters that are not letters/numbers and change them. You should then be able to return your activations through the usual process.