I removed a code in the theme editor page of my wordpress dashboard and I tried to save, i got an error
Your PHP code changes were rolled back due to an error on line 24 of file wp-content/themes/swiftkas/header.php. Please fix and try saving again.
Call to undefined function vce_get_option()
I also got similar error when trying to edit some words in single.php. I only achieved that using ftp server of my host.
The formal version works fine. It get easy for me editing my theme through my admin dashboard.