Hi @wahyuagung,
Hope you are doing fine. In our development environment, the font family is working. Will you please check by clearing the caches completely from your site and browser?
If that doesn’t solve the issue, you need to run a conflict test on your site to detect what actually causes the problem. To do so, first of all, switch your theme to a default theme like 2020 or Hello Elementor and check if the issue is still persists. If that solves your issue, that means the issue is related to the theme you are using.
If switching to the default theme also doesn’t help, then please check if there are any conflicts between the installed plugin. To troubleshoot the issue, please deactivate other plugins except for Elementor and ElementsKit and check if the issue still persists. If that solves your problem, activate the plugins one by one, and continue checking the issue. In this way, you will be able to detect which one causes the problem.
Let me know if that helps or if you need any further assistance.
Best Regards,
?Amir