codeofalice

I had the same issue, and this is how I fixed it:

Go to Appearance > Editor in your admin panel.

For the Flat Theme, go to hooks.php.

Under the <?php line, add the following code:

function flat_hook_page_before() {
	do_action( 'flat_page_before' );
	do_action( 'tha_page_before' );
}

function flat_hook_page_after() {
	do_action( 'flat_page_after' );
	do_action( 'tha_page_after' );
}

function flat_hook_page_top() {
	do_action( 'flat_page_top' );
	do_action( 'tha_page_top' );
}

function flat_hook_page_bottom() {
	do_action( 'flat_page_bottom' );
	do_action( 'tha_page_bottom' );
}

and update the file. It should fix the error.

I assume that when the creator updates the template, they’ll probably fix this bug, but now I don’t have the error anymore.