There are several reasons why the extension might not generate content on your Magento.

1. First, make sure the ChatGPT API key on the OpenAI platform are generated if OpenAI key is used as Content Generation Provider:

Then add it to the Secret Key field in Magento on the OpenAI Core module configuration page: 

2. If the correct key is being used, but content is still not generated, it might be possible that you have hit your maximum monthly spend (hard limit) for the API. This means that you have consumed all the credits or units allocated to your plan and have reached the limit of your billing cycle. To solve this, check your current quota in your ChatGPT account settings. To solve the issue, consider upgrading to a pay-as-you-go plan that offers a higher quota.

3. There is a chance that you have submitted too many tokens or requests in a short period of time and have exceeded the number of requests allowed. It may happen if you generate content using mass product actions for a great amount of products. The solution is to wait until the limit block is lifted or update the rate limits plan:

      

4. It can be useful to check the Magento log file on the errors regarding the ChatGPT extension. You can check logs with the next command:

tail -n20 var/log/system.log