I am using ausart theme, when i enable wp-config to true it gave me this error for sidebar thing:
Notice: register_sidebar was called incorrectly. No id was set in the arguments array for the “Footer – column2” sidebar. Defaulting to “sidebar-9”. Manually set the id to “sidebar-9” to silence this notice and keep existing sidebar content. Please see Debugging in WordPress for more information. (This message was added in version 4.2.0.)