Add common issue and solution

README.md

@@ -26,6 +26,7 @@ Host it on your own server, define your workflow, install plugins and themes, an
 - PipraPay Plugins & Integrations Directory
     - Plugin Directory: [docs/Plugin-Directory.md](docs/Plugin-Directory.md)
 - Browse all docs: [docs/](docs/)
+- API docs: [piprapay.readme.io](https://piprapay.readme.io)
 
 ---
 
@@ -91,6 +92,215 @@ We welcome contributions from the community. To contribute:
 
 ---
 
+## ❓ Common Issues & Solutions
+
+<details>
+<summary>⏳ Pending payment is not auto-verifying</summary>
+
+**Possible Cause:**  
+The cron job responsible for verifying payments is not running.  
+
+**Solution:**  
+1. Log in to the PipraPay **Admin Panel**.  
+2. Navigate to **System Settings > Cron Job**.  
+3. Copy the provided command.  
+4. Set the cron job in your hosting control panel to run every **10 minutes**.  
+
+</details>
+
+---
+
+<details>
+<summary>🔌 PipraPay tool app is not connecting</summary>
+
+**Possible Cause:**  
+The base URL or webhook URL is not properly configured.  
+
+**Solution:**  
+1. First, add your **base URL** (e.g., `https://example.com` or `https://pay.example.com`).  
+2. After setting the base URL, add the **full webhook URL**.  
+
+</details>
+
+---
+
+<details>
+<summary>💳 No payment methods showing in the Admin Panel</summary>
+
+**Possible Cause:**  
+The payment method plugins are not activated.  
+
+**Solution:**  
+1. Go to **Admin Panel > Plugin > Installed Plugins**.  
+2. Activate the required **payment method plugins**.  
+
+</details>
+
+---
+
+<details>
+<summary>🛒 Payment methods not showing on the checkout page</summary>
+
+**Possible Causes:**  
+- Minimum and maximum payment amounts are not configured.  
+- The payment method is disabled.  
+
+**Solution:**  
+1. Set the **minimum and maximum amount** for the payment method.  
+2. Verify the **status**:  
+   - If it is **disabled**, switch it to **enabled**.  
+
+</details>
+
+---
+
+<details>
+<summary>💱 Currency mismatch (e.g., 1000 BDT showing as $1000 USD)</summary>
+
+**Possible Cause:**  
+Currency exchange rates are not set correctly.  
+
+**Solution:**  
+1. In the **Admin Panel**, go to **System Settings > Currency Settings**.  
+2. Update the currency rate.  
+   - Example: `1 BDT = 0.0082 USD` (not `1 BDT = 1 USD`).  
+
+</details>
+
+---
+
+<details>
+<summary>🔄 Website does not redirect after successful payment</summary>
+
+**Possible Cause:**  
+Auto-redirect option is not enabled.  
+
+**Solution:**  
+1. Go to **Admin Panel > Appearance > Customize**.  
+2. Enable the **Auto Redirect** option.  
+
+</details>
+
+---
+
+<details>
+<summary>🔑 Forgot Admin Panel password</summary>
+
+**Solution:**  
+1. Log in to your **hosting control panel**.  
+2. Open the directory where **PipraPay files** are located.  
+3. Edit the file `pp_config.php`.  
+4. Change:  
+   ```php
+   $password_reset = 'off';
+   ```  
+   to  
+   ```php
+   $password_reset = 'on';
+   ```  
+5. Go to the **PipraPay Admin Login page** and click **Reset Password**.  
+6. Set your new password.  
+7. Re-edit `pp_config.php` and set:  
+   ```php
+   $password_reset = 'off';
+   ```  
+
+⚠️ **Important:** Always revert `$password_reset` to `'off'` after resetting for security reasons.  
+
+</details>
+
+---
+
+<details>
+<summary>🌐 Payment API returning errors</summary>
+
+**Possible Cause:**  
+Incorrect API credentials or endpoint configuration.  
+
+**Solution:**  
+1. Verify your **API key** and **secret** from the Admin Panel.  
+2. Ensure the API endpoint matches your environment (**sandbox** vs **production**).  
+3. Test using a REST client (e.g., Postman).  
+
+</details>
+
+---
+
+<details>
+<summary>📦 Checkout page not loading properly</summary>
+
+**Possible Cause:**  
+JavaScript conflicts or missing plugin files.  
+
+**Solution:**  
+1. Clear your **browser cache**.  
+2. Recheck plugin installation in the Admin Panel.  
+3. Disable conflicting plugins or themes temporarily.  
+
+</details>
+
+---
+
+<details>
+<summary>🖥️ Hosting errors (500 Internal Server Error)</summary>
+
+**Possible Cause:**  
+Server misconfiguration or insufficient resources.  
+
+**Solution:**  
+1. Check your server **error logs**.  
+2. Increase **memory limit** and **max execution time** in PHP settings.  
+3. Restart your web server (Apache/Nginx).  
+
+</details>
+
+---
+
+<details>
+<summary>🔐 SSL certificate issues</summary>
+
+**Possible Cause:**  
+Expired or misconfigured SSL certificate.  
+
+**Solution:**  
+1. Renew your SSL certificate with your hosting provider.  
+2. Update the certificate path in your server configuration.  
+3. Test the SSL status using online tools like **SSL Labs**.  
+
+</details>
+
+---
+
+<details>
+<summary>📧 Customers not receiving email notifications</summary>
+
+**Possible Cause:**  
+Email server or SMTP configuration is incorrect.  
+
+**Solution:**  
+1. Go to **Admin Panel > Plugins > Installed Plugin > SMTP Mailer Pro**.  
+2. Go to **Admin Panel > Modules > SMTP Mailer Pro > Configure SMTP with valid credentials**.   
+3. Test the email function using the built-in test tool.  
+
+</details>
+
+---
+
+<details>
+<summary>⚙️ Database connection failed</summary>
+
+**Possible Cause:**  
+Invalid database credentials or server downtime.  
+
+**Solution:**  
+1. Verify database credentials in `pp_config.php`.  
+2. Check database server status.  
+3. Ensure correct **host, port, username, and password** are set.  
+
+</details>
+
+---
+
 ## 🤷‍♂️ Community & Support
 
 - Website: https://piprapay.com/