I hope you are well today and thank you for your question.
If this is not the case then Would you mind if I log in to your site and do some troubleshooting? If this is ok then could you please temporary share me your site admin login details privately by adding them in the box having text “Enter your private content here (only you and forum moderators will be able see it)”?
I logged into your website and saw you are using outdated version of PHP on your site as shown in the attached screenshot so please update it to the latest version by contacting your web host.
Also, please delete and reinstall the below latest version of the Jevelin theme on your site.
Please login to access this file