Hi.,

Sorry for the inconvenience , no need to install the theme again. Kindly install our designthemes-core-features plugin manually via FTP.

Get into the file path wp-content/themes/humanity/framework.plugins there you can find our plugin zip file unzip the folder there you can find the designthemes-core-features folder then copy the folder ( wp-content/themes/humanity/framework.plugins/designthemes-core-features/designthemes-core-features ) and paste under the plugins folder and check out the issue.

Refer : http://recordit.co/MaToCvILpC