Dear Kenan Kılıç,
We’re so sorry for keep you waiting so long.
Upon checking your site, I could see that you’re using Visual Composer version 4.7.1. Now, please kindly help us to downgrade to Visual Composer version 4.6.2 at here https://www.dropbox.com/s/tykk7mkvna26p1g/old_version_4.6.2_js_composer.zip?dl=1
Also, please deactivate all third parties plugin to avoid any conflict.
Finally, try to change the number at [DE Category block] again.
After following these steps, if the issue has not solved, please let us now. We will check carefully at your site again.
Thank you so much for your patient!