I have the same problem. Has this been resolved? I’m not using the Sage theme either. I thought the plugin was supposed to be theme agnostic.I installed the plugin from the plugins menu in the admin. Line 213 where the parse error is occurring contains the following:
$this->template_name = basename( Roots\Sage\Wrapper\template_path() );
What’s strange is that the plugin works on one of my wordpress installs, then I migrated the wordpress install to a new domain and hosting account and it doesn’t work there (everything works fine on the migrated account except for this plugin). The plugin code is the same on each install.
Thanks for any help you can give. Use the plugin all the time, its very helpful for editing my themes.