Kindly, update our theme with latest version and check the issue. Follow the below steps to update the theme.
Step 1 : Download the theme from themeforest page.
Step 2 : If you have made any custom changes in the code, please take a backup of it.
Step 3 : Overwrite the updated theme files to the older theme files. Update the custom change that you had already.
Step 4 : Go to wp-content/plugins/ through FTP.
Step 5 : Remove the folder designthemes-core-features/ from wp-content/plugins/
Step 6 : Then Login to Dashboard -> Appearance -> Install Plugins. Install the Designthemes Core Features plugin. That’s it.
Now you are updated to the latest version.