Common Elementor issues
Theme uses Elementor to build, Elementor is constantly updated so it is difficult to avoid problems in the future. When you update Elementor and the website has problems, the first thing to do is delete the core plugin and update again because we always handle everything. Update errors from Elementor earliest in core plugin. After updating, if you still cannot solve the problem, please contact us via support.
If you encounter a problem, Please go to Admin / Plugins to delete the "Liquid Custom Builder" current version then reinstall the latest version (2.1) by clicking: Admin / Appearance / Installed Plugins, here will show all the plugins that the Theme requires then install Liquid Custom Builder from there then clear cache on your site. I hope your problem will be solved. If your problem persists, Please send me your site info (link + admin access). Our developer will go check and help you. Thank you!