I NOT RESOLVE THIS ISSUE

Hello, I’m sorry to hear that you’re facing this issue with the invalid API key. This error typically occurs when the API key has not been copied correctly or if it has been regenerated after configuring the Bing URL Submission API with Rank Math.

To resolve this, please follow these steps:

1. Get the Correct API Key:

   • Go to your Bing Webmaster Tools account.
   • Navigate to Settings → API Access → API Key and click the Copy button to copy your API key.
     

2. Add the API Key in Rank Math:

   • In your WordPress admin area, go to Rank Math SEO → Instant Indexing.
   • Under the Settings tab, paste the Bing API Key you copied and click the Save Changes button.
     

3. Avoid Regenerating the API Key: After configuring the settings, make sure not to regenerate the API key in your Bing Webmaster Tools, as this will invalidate the existing key.

Once you’ve completed these steps, try submitting the URLs again. If you continue to experience issues, please reply to this ticket, and a human agent from our support team will assist you further. Thank you for raising this concern!

Sources:
How to Fix Failed to Submit Post to the Bing URL Submission API Error » Rank Math