I checked your theme version and I see that you have v1.3 installed.
The latest Elvyre theme version is 1.4. Could you please update your theme to the latest version?
This problem has been solved in 1.4 version, and it caused by the Retina image display on page title.
Quote from changelog:
v1.4: Fixed issue with Retina image on page title.
So, updating your theme will solve this problem and remove the error message. Make sure to backup the current theme settings in case something goes wrong.