today I been try to modify the logo in the header builder and the page just keep loading and never finishing.
Actually same the problem with the slider revolution. Im not able to change the settings, but mainly the problem the themes error.
Please deactivate all the third parties plugins not related to the theme and provide admin access and FTP.
In order to distinguish which plugins relate to the theme and which do not, deactivate them all and then navigate to Appearance > Install plugins and activate all in the list.