Hi Trung,
Would you please kindly go to X/Pro > Status and share your server information reported there?
Also, we will need to have a staging version of your website to check the plugin in so that if there is a problem your live website will not be affected. You can contact your hosting service provider for that.
Finally, if there is a problem you can simply go to wp-content/plugins and rename tco-white-label folder to something else and it will force the plugin to be deactivated.
I checked the plugin on Apache and it works ok, but it seems that you use Nginx and we need to take a look into the matter.
Thank you.