License Activation Issues for Nipper (v2.x): What are the common causes and recommended fixes?

Please Note: This guide is for Nipper (v2) only.

Human Error: Incorrect Serial number or Activation code entered. It is best to copy and paste the license details directly into Nipper to avoid mistakes.
Incorrect Nipper Version: Ensure the license is being activated on the correct version of Nipper. The email containing your license credentials will specify whether it is compatible with Nipper v2.x or v3.x or you can validate the same by logging into your account at account.titania.com. Note that licenses for Nipper v2.x cannot be used with Nipper v3.x, and vice versa.
Older Versions (v2.13.4 and below): Online license activation does not work with versions lower than v2.13.4. If you're using an older version and don't want to upgrade, you'll need to follow the offline activation process.
Internet Access: When attempting online license activation, ensure the machine has internet access. A proxy server within your organization could be restricting the connection between your Nipper and Titania's licensing server.
License Start Date: Verify that you are not trying to use the license before its start date. You can check the start date in the original email sent by Titania containing your license details or by logging into your account at account.titania.com.
Expired License: Ensure the license has not expired. You can verify this by logging into your account at account.titania.com or by checking the expiration date in the original email containing your license details.

There are several reasons for a license activation error to occur within Nipper (v2), please check this list to troubleshoot the problem.