> For the complete documentation index, see [llms.txt](https://docs.burpgpt.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.burpgpt.app/help-and-faq/faq/what-are-the-possible-causes-for-an-unsuccessful-activation-of-my-burpgpt-pro.md).

# Why did licence activation fail?

Resolve common licence activation problems.

Select BurpGPT Pro under `Extensions` → `Installed` and check the `Errors` tab. If the message includes an HTTP status code, include it when contacting support. If no status code appears, check your licence key and network access using the checklist below.

Check the following:

* **Licence key:** Copy the complete key from your purchase email and confirm that the licence is still valid.
* **Network access:** Allow HTTPS access to `burpgpt.app` and `burpgpt.netlify.app` through your firewall or network controls.
* **Activation allowance:** Check the activation count displayed in the licence dialog. Contact support if you need help with your allowance.
* **System time:** Ensure your computer's date, time, and time zone are correct.
* **Installation:** Check the [requirements](/getting-started/installation.md#prerequisites). If the JAR is damaged, download a fresh copy.

If the problem persists, provide support with your extension version, Burp version, order ID, and error message. Do not post your licence key publicly.