> ## Documentation Index
> Fetch the complete documentation index at: https://docs.alignet.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Troubleshooting
> Quick guide to identifying and resolving common WooCommerce issues.
If you have difficulties with integrating or processing payments, check with this guide before contacting the technical support. Most problems are solved by revising network configuration and credentials.
## 1. Common Errors table
Identifies the symptoms and applying the recommended solution:
| Problem | probable cause | Suggested solution |
| :----------------------------------- | :------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------ |
| **No Loading Form** | Invalid credentials or wrong environment. | Check that the Merchant ID and the Keys match the mode (Sandboxproduction). |
| **Successful payment without order** | The Webhole (S2S) was unable to notify your store. | Validate that you URL S2S be public and check if a Firewall or Security Plugin blocks the IP from Alignet One. |
| **Failed billing data** | Mandatory fields are missing from check out. | Make sure that the client complete name, name, email and phone. |
| **Reversal doesn't work.** | The transaction doesn't allow refunds yet. | Check that the original transaction is in status **Liquid**. Payments on the same day do not always allow for an immediate reverting. |
| **Payment button doesn't appear** | JavaScript conflict or SSL absent. | Check the browser console (F12) and be sure to navigate by **HTTPS**. |
***
## 2. Technical Diagnosis (Logs)
The plugin records every relevant interaction. If a payment fails "quietly," the logs will tell you why.
1. Go to **WooCommerce** > **State** > **Loks**.
2. At the right drop-down, look for the file that starts with **payme- checkout-...** and give them to **See**.
3. Search for lines that contain **ERROR** or **RESPONSE**. That's where you'll see the processor's response code (Visa / Mastercard).
Can compare the error codes found in the login with our [Response Codes Guide](https://docs.pay-me.com/referencias/codigos-visa-mastercard).
***
## 3. Server Verification
To have the plugin communicated with the gateway correctly Alignet One, your server should allow:
* **Data output:** Connections to the URLs of API of Alignet One (Port 443).
* **Data entry (S2S):** Your server should accept requests **POST** Exstore.
* **Extensions PHP:** Check that **curl** and **openssl** are active in your PHP.
***
## 4. Do you still need help?
If the problem persists after revising the above points, prepare the following information for our support equipment:
1. **Merchant ID** Your merchant.
2. **URL from your store**.
3. **Screenshot** an exact error or message.
4. **Log file** from the failed transaction.
***
Email us with your support kit.
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