Hello Arzhang.

Thank you for your purchase.

I opened the link you provided in Chrome, and it indeed doesn't load - the circle just keeps spinning. I also saw you have some errors in the console:

wpDataTables is a WYSIWYG (What You See Is What You Get) concept based plugin. This means that the table should look the same both in back-end and in front-end. If your front-end table looks and behaves differently than in back-end, this usually implies that there is another plugin (or the current theme) that's changing the behavior of our plugin.

Can you try changing the theme you're using, and if that doesn't fix the issue - disable all plugins except for wpDataTables and test again? If that resolves the issue, then activate the plugins one by one until the issue reoccurs. Once it does - you will find which plugin is causing the issue here.

Unfortunately the issues like conflicts with third party plugins or themes are always possible due to the nature of WP, and it might take significant time to investigate and replicate the issue on our side, to be able to find the source of the problem, especially when the plugin or theme is not familiar to us. 

Best regards.