OnePress Theme Error

Hello Team,
I hope you are well. Now I have a concern, my client-facing issue by One press theme he gets below the message.

“Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site and notifies you with this automated email.
In this case, WordPress caught an error with your theme, OnePress.
First, visit your website (https://www.futuretofind.com/) and check for any visible issues. Next, visit the page where the error was caught (https://www.futuretofind.com/wp-admin/admin.php?page=stats&noheader&proxy&chart=admin-bar-hours-scale) and check for any visible issues.
Please let me know if you have any specific advice on this.”

Thanks