Hello Nader.

Thank You for Your purchase.

Thank You for Your purchase.

There is probably a conflict with the bootstrap.js files.

Please go to wpDataTables main Settings on Your wp-admin page. You'll see Include full bootstrap front-end and Include full bootstrap back-end. Disable the second slider (Include full bootstrap back-end), hit Apply and refresh Your page.

If that doesn't work, please try this:

Go to Plugins page and disable wpDataTables.

Then go to Plugins/Editor on Your wp-admin page.

In the top right corner select wpDataTables and go to source/class.wdttools.php.

In that file, around line 900, You'll find this code:

if (!is_admin() && get_option('wdtIncludeBootstrap') == 1) {
         wp_enqueue_script('wdt-bootstrap', WDT_JS_PATH . 'bootstrap/bootstrap.min.js', array('jquery', 'wdt-bootstrap-select'), WDT_CURRENT_VERSION, true);
        }else if (is_admin() && get_option('wdtIncludeBootstrapBackEnd') == 1){
            wp_enqueue_script('wdt-bootstrap', WDT_JS_PATH . 'bootstrap/bootstrap.min.js', array('jquery', 'wdt-bootstrap-select'), WDT_CURRENT_VERSION, true);
        }else{
            wp_enqueue_script('wdt-bootstrap', WDT_JS_PATH . 'bootstrap/noconf.bootstrap.min.js', array('jquery', 'wdt-bootstrap-select'), WDT_CURRENT_VERSION, true);
        }

Go ahead and comment the last two wp_enqueue_script lines, so the code looks like this:

if (!is_admin() && get_option('wdtIncludeBootstrap') == 1) {
         wp_enqueue_script('wdt-bootstrap', WDT_JS_PATH . 'bootstrap/bootstrap.min.js', array('jquery', 'wdt-bootstrap-select'), WDT_CURRENT_VERSION, true);
        }else if (is_admin() && get_option('wdtIncludeBootstrapBackEnd') == 1){
          //  wp_enqueue_script('wdt-bootstrap', WDT_JS_PATH . 'bootstrap/bootstrap.min.js', array('jquery', 'wdt-bootstrap-select'), WDT_CURRENT_VERSION, true);
        }else{
          //  wp_enqueue_script('wdt-bootstrap', WDT_JS_PATH . 'bootstrap/noconf.bootstrap.min.js', array('jquery', 'wdt-bootstrap-select'), WDT_CURRENT_VERSION, true);
        }

Hit Update File on the bottom of that page; activate wpDataTables from the main Plugins page again, and that should solve the issue.

Please let me know if You managed to resolve the issue.

Best regards.

Hello again Nader.

You are welcome.  Glad that we solved the issue.

I think it would've worked if You also disabled the Include bootstrap on front-end slider, but commenting that line will do of course.

If you have any more issues or questions feel free to open a new ticket, we will gladly help.

We'd greatly appreciate it if you could take a minute and leave a Review on CodeCanyon on this link. Thanks! 

Best regards.