The "Invalid or missing API key" error appears when the widget cannot authenticate with the server.
**Common Causes and Solutions:**
**1. Incorrect API Key**
- Double-check your API key is copied correctly
- Ensure no extra spaces, line breaks, or characters
- Keys are case-sensitive — copy the exact string from your admin panel
**2. API Key Was Regenerated**
- If you recently regenerated your API key, the old key no longer works
- Update the key in your website code or WordPress settings
**3. Account Suspended**
- If your payment is overdue, your account may be suspended
- Log in toRemappingWebsite.com client area and pay any outstanding invoices
- Your widget will resume working once the account is reactivated
**4. Account Terminated**
- If your subscription was cancelled and terminated, the API key is permanently disabled
- You will need to purchase a new subscription to get a new key
**5. Placeholder Key**
- Ensure you replaced `YOUR_API_KEY_HERE` with your actual API key
- The placeholder text is not a valid key
**How to Verify Your Key:**
You can test your API key by visiting this URL in your browser:
```
https://remappingwebsite.com/lookup/api/validate-key.php?api_key=YOUR_KEY
```
If the key is valid, you will see `{"valid": true}`. If not, you will see an error message.
