That was known issue if the site has enabled language filter system plugin, can you download my attached file and replace into this file location and see how it goes.

JoomlaFolder/administrator/components/com_easysocial/includes/ajax/ajax.php

Thank you very much!!!!

You're most welcome.

Just for your information, I have locked and marked this thread as resolved to avoid confusions in the future. Please start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiries.

Thanks for understanding