I hope you are well today and thank you for your question.
Are you using the redux framework on your website?
If yes then please deactivate the Unyson plugin on your website as it conflicts with the Redux framework and check whether it resolves your issue.
If still the issue persists then could you please share your site URL where it’s happening so that I can troubleshoot it?
Also, please try changing it from the theme settings displayed on the below path.
Admin Area -> Jevelin -> Theme Settings