diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..05eb778
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+compile.sh
\ No newline at end of file
diff --git a/assets/public.js b/assets/public.js
index 29a0615..b38f884 100644
--- a/assets/public.js
+++ b/assets/public.js
@@ -227,6 +227,22 @@ jQuery(document).ready(function($){
         }
     }
     
+    // Helper function to get output setting by key
+    function getOutputSetting(output, key) {
+        // Convert output object to array if needed
+        if (Array.isArray(output)) {
+            return output.find(function(o) { return o.key === key; });
+        } else {
+            // output is an object, find by matching key property
+            for (var prop in output) {
+                if (output[prop].key === key) {
+                    return output[prop];
+                }
+            }
+        }
+        return null;
+    }
+    
     // Render vertical table display
     function renderVerticalTable(checkerId, res) {
         var thisChecker = $('#checker-' + checkerId);
@@ -240,7 +256,7 @@ jQuery(document).ready(function($){
             
             $.each(row, function(q, r) {
                 var id = q.replace(/\s/g, '_').replace(/\./g, '_').toLowerCase();
-                var outputSetting = res.output.find(function(o) { return o.key === q; });
+                var outputSetting = getOutputSetting(res.output, q);
                 
                 if (!outputSetting || outputSetting.hide === 'yes') return;
                 
@@ -283,7 +299,7 @@ jQuery(document).ready(function($){
         // Headers
         if (res.rows.length > 0) {
             $.each(res.rows[0], function(q, r) {
-                var outputSetting = res.output.find(function(o) { return o.key === q; });
+                var outputSetting = getOutputSetting(res.output, q);
                 if (!outputSetting || outputSetting.hide === 'yes') return;
                 resultDiv += '<th style="color:'+res.settings.header+'">'+q+'</th>';
             });
@@ -295,7 +311,7 @@ jQuery(document).ready(function($){
             resultDiv += '<tr>';
             $.each(row, function(q, r) {
                 var id = q.replace(/\s/g, '_').replace(/\./g, '_').toLowerCase();
-                var outputSetting = res.output.find(function(o) { return o.key === q; });
+                var outputSetting = getOutputSetting(res.output, q);
                 
                 if (!outputSetting || outputSetting.hide === 'yes') return;
                 
@@ -343,7 +359,7 @@ jQuery(document).ready(function($){
             
             $.each(row, function(q, r) {
                 var id = q.replace(/\s/g, '_').replace(/\./g, '_').toLowerCase();
-                var outputSetting = res.output.find(function(o) { return o.key === q; });
+                var outputSetting = getOutputSetting(res.output, q);
                 
                 if (!outputSetting || outputSetting.hide === 'yes') return;
                 
@@ -391,7 +407,7 @@ jQuery(document).ready(function($){
             
             $.each(row, function(q, r) {
                 var id = q.replace(/\s/g, '_').replace(/\./g, '_').toLowerCase();
-                var outputSetting = res.output.find(function(o) { return o.key === q; });
+                var outputSetting = getOutputSetting(res.output, q);
                 
                 if (!outputSetting || outputSetting.hide === 'yes') return;
                 
diff --git a/dw-sheet-data-checker-pro.php b/dw-sheet-data-checker-pro.php
index 752dc7e..34a599a 100644
--- a/dw-sheet-data-checker-pro.php
+++ b/dw-sheet-data-checker-pro.php
@@ -2,7 +2,7 @@
 /**
  * Plugin Name:       Sheet Data Checker Pro
  * Description:       Check data from Google Sheet with customizable filter form
- * Version:           1.4.0
+ * Version:           1.4.2
  * Plugin URI:        https://dwindi.com/sheet-data-checker
  * Author:            Dwindi Ramadhana
  * Author URI:        https://facebook.com/dwindi.ramadhana
@@ -22,13 +22,35 @@
 // Exit if accessed directly
 if ( ! defined( 'ABSPATH' ) ) exit;
 
-define( 'SHEET_CHECKER_PRO_NAME', 'Sheet Data Checker Pro' );
-define( 'SHEET_CHECKER_PRO_MEMBER', 'https://member.dwindi.com' );
-define(	'SHEET_CHECKER_PRO_BASENAME', plugin_basename(__FILE__));
-define( 'SHEET_CHECKER_PRO_VERSION', '1.4.0' );
-define( 'SHEET_CHECKER_PRO_URL', plugin_dir_url( __FILE__ ) );
-define( 'SHEET_CHECKER_PRO_PATH', plugin_dir_path( __FILE__ ) );
-define( 'SHEET_CHECKER_PRO_DOMAIN', 'sheet-data-checker-pro' );
+if ( ! defined( 'SHEET_CHECKER_PRO_NAME' ) ) {
+	define( 'SHEET_CHECKER_PRO_NAME', 'Sheet Data Checker Pro' );
+}
 
-require_once SHEET_CHECKER_PRO_PATH . 'includes/class-Sheet-Data-Checker-Pro.php';
+if ( ! defined( 'SHEET_CHECKER_PRO_MEMBER' ) ) {
+	define( 'SHEET_CHECKER_PRO_MEMBER', 'https://member.dwindi.com' );
+}
+
+if ( ! defined( 'SHEET_CHECKER_PRO_BASENAME' ) ) {
+	define( 'SHEET_CHECKER_PRO_BASENAME', plugin_basename( __FILE__ ) );
+}
+
+if ( ! defined( 'SHEET_CHECKER_PRO_VERSION' ) ) {
+	define( 'SHEET_CHECKER_PRO_VERSION', '1.4.2' );
+}
+
+if ( ! defined( 'SHEET_CHECKER_PRO_URL' ) ) {
+	define( 'SHEET_CHECKER_PRO_URL', plugin_dir_url( __FILE__ ) );
+}
+
+if ( ! defined( 'SHEET_CHECKER_PRO_PATH' ) ) {
+	define( 'SHEET_CHECKER_PRO_PATH', plugin_dir_path( __FILE__ ) );
+}
+
+if ( ! defined( 'SHEET_CHECKER_PRO_DOMAIN' ) ) {
+	define( 'SHEET_CHECKER_PRO_DOMAIN', 'sheet-data-checker-pro' );
+}
+
+if (!class_exists('SHEET_DATA_CHECKER_PRO')) {
+    require_once SHEET_CHECKER_PRO_PATH . 'includes/class-Sheet-Data-Checker-Pro.php';
+}
 new SHEET_DATA_CHECKER_PRO();
\ No newline at end of file
diff --git a/includes/class-Sheet-Data-Checker-Pro.php b/includes/class-Sheet-Data-Checker-Pro.php
index b1fccf2..14fdd2d 100644
--- a/includes/class-Sheet-Data-Checker-Pro.php
+++ b/includes/class-Sheet-Data-Checker-Pro.php
@@ -24,7 +24,9 @@ class SHEET_DATA_CHECKER_PRO {
         add_action( 'init', [$this, 'create_custom_post_type'] );
         add_action( 'admin_enqueue_scripts', [$this, 'enqueue_bootstrap_admin'] );
 
-        include SHEET_CHECKER_PRO_PATH . 'includes/class-License.php';
+        if (!class_exists('CHECKER_LICENSE')) {
+            include SHEET_CHECKER_PRO_PATH . 'includes/class-License.php';
+        }
         $lis = new CHECKER_LICENSE();
         
         if(true == $lis->the_lis()){
@@ -38,7 +40,9 @@ class SHEET_DATA_CHECKER_PRO {
             add_action( 'wp_ajax_load_repeater_field_card', [$this, 'load_repeater_field_card'] );
             add_action( 'wp_ajax_load_output_setting', [$this, 'load_output_setting'] );
 
-            require 'class-Shortcode.php';
+            if (!class_exists('CHECKER_SHORTCODE')) {
+                require 'class-Shortcode.php';
+            }
             new CHECKER_SHORTCODE();
             
         }
diff --git a/includes/class-Shortcode.php b/includes/class-Shortcode.php
index 474defa..c53cd90 100644
--- a/includes/class-Shortcode.php
+++ b/includes/class-Shortcode.php
@@ -22,7 +22,9 @@ class CHECKER_SHORTCODE extends SHEET_DATA_CHECKER_PRO {
 	public function __construct() {
 
         // Load security class
-        require_once SHEET_CHECKER_PRO_PATH . 'includes/class-Security.php';
+        if (!class_exists('CHECKER_SECURITY')) {
+            require_once SHEET_CHECKER_PRO_PATH . 'includes/class-Security.php';
+        }
 
         add_shortcode('checker', [$this, 'content'] );
         add_action( 'wp_enqueue_scripts', [$this, 'enqueue'] );
@@ -101,13 +103,8 @@ class CHECKER_SHORTCODE extends SHEET_DATA_CHECKER_PRO {
         // Set the delimiter based on the format
         $delimiter = $link_format == 'tsv' ? "\t" : ","; // Use tab for TSV, comma for CSV
 
-        if (($handle = fopen($url, "r")) !== false) {
-            $keys = fgetcsv($handle, 0, $delimiter); // Read the first row as keys
-            while (($row = fgetcsv($handle, 0, $delimiter)) !== false) {
-                $data[] = array_combine($keys, $row); // Combine keys with row values and add to the data array
-            }
-            fclose($handle);
-        }
+        // Use WordPress HTTP API instead of fopen for better server compatibility
+        $data = $this->fetch_remote_csv_data($url, $delimiter);
         $background_color = $checker['card']['background'];
         if($checker['card']['bg_opacity'] < 100){
             $background_color = $checker['card']['background'].''.$checker['card']['bg_opacity'];
@@ -246,6 +243,58 @@ class CHECKER_SHORTCODE extends SHEET_DATA_CHECKER_PRO {
 
     }
 
+    /**
+     * Fetch remote CSV/TSV data using WordPress HTTP API
+     * Replaces fopen() for better server compatibility
+     */
+    private function fetch_remote_csv_data($url, $delimiter, $limit = null) {
+        $data = [];
+        
+        // Use WordPress HTTP API to fetch remote file
+        $response = wp_remote_get($url);
+        
+        if (is_wp_error($response)) {
+            error_log('Failed to fetch remote file: ' . $response->get_error_message());
+            return $data;
+        }
+        
+        $body = wp_remote_retrieve_body($response);
+        if (empty($body)) {
+            error_log('Empty response from remote file: ' . $url);
+            return $data;
+        }
+        
+        // Parse CSV/TSV data
+        $lines = explode("\n", $body);
+        if (empty($lines)) {
+            return $data;
+        }
+        
+        // Get headers from first line
+        $keys = str_getcsv($lines[0], $delimiter);
+        
+        // Process data rows
+        $count = 0;
+        for ($i = 1; $i < count($lines); $i++) {
+            if (empty(trim($lines[$i]))) {
+                continue; // Skip empty lines
+            }
+            
+            $row = str_getcsv($lines[$i], $delimiter);
+            if (count($keys) === count($row)) {
+                $data[] = array_combine($keys, $row);
+                $count++;
+                
+                // Apply limit if specified
+                if ($limit && $count >= $limit) {
+                    break;
+                }
+            }
+        }
+        
+        return $data;
+    }
+
     public function checker_public_validation() {
 
         $post_id = $_REQUEST['checker_id'];
@@ -295,13 +344,8 @@ class CHECKER_SHORTCODE extends SHEET_DATA_CHECKER_PRO {
         // Set the delimiter based on the format
         $delimiter = $link_format == 'tsv' ? "\t" : ","; // Use tab for TSV, comma for CSV
 
-        if (($handle = fopen($url, "r")) !== false) {
-            $keys = fgetcsv($handle, 0, $delimiter); // Read the first row as keys
-            while (($row = fgetcsv($handle, 0, $delimiter)) !== false) {
-                $data[] = array_combine($keys, $row); // Combine keys with row values and add to the data array
-            }
-            fclose($handle);
-        }
+        // Use WordPress HTTP API instead of fopen for better server compatibility
+        $data = $this->fetch_remote_csv_data($url, $delimiter);
 
         $validator = $_REQUEST['validate'];
         $validation = [];
@@ -380,21 +424,8 @@ class CHECKER_SHORTCODE extends SHEET_DATA_CHECKER_PRO {
         $link_format = substr($url, -3);
         $delimiter = $link_format == 'tsv' ? "\t" : ",";
         
-        $data = [];
-        $handle = fopen($url, "r");
-        
-        if ($handle !== false) {
-            $keys = fgetcsv($handle, 0, $delimiter);
-            $count = 0;
-            
-            while (($row = fgetcsv($handle, 0, $delimiter)) !== false && $count < $limit) {
-                if (count($keys) === count($row)) {
-                    $data[] = array_combine($keys, $row);
-                    $count++;
-                }
-            }
-            fclose($handle);
-        }
+        // Use WordPress HTTP API instead of fopen for better server compatibility
+        $data = $this->fetch_remote_csv_data($url, $delimiter, $limit);
         
         wp_send_json([
             'count' => count($data),