5.6 vs 5.5 upgrade breaks site – functions.php avia_lang_setup();

Hello,

There is a change to functions.php between 5.5 and 5.6 versions, around line(s): 179 to 184.
The new code about language setup seems to break the site on upgrade between versions, I have fixed the problem by changing the code as below. Now the site loads the backend with my change after upgrade by simply reloading this url: https://staging.sheilds.org/wp-admin/update-core.php

Here’s the new lines with a simple fix, I placed above:

	avia_lang_setup(); //Replaced this line and commented out the below lines, as was breaking site on upgrade from 5.5 to 5.6
	/*if( did_filter( 'after_setup_theme' ) )
		
	{
		avia_lang_setup();
	}*/

Here’s the error I received:

Fatal error: Uncaught Error: Call to undefined function did_filter() in /pathtoinstall/wp-content/themes/enfold/functions.php:179 Stack trace: #0
/pathtoinstall/wp-settings.php(555): include() #1
/pathtoinstall/wp-config.php(121): require_once(‘/var/www/vhosts…’) #2
/pathtoinstall/wp-load.php(50): require_once(‘/var/www/vhosts…’) #3
/pathtoinstall/wp-admin/admin.php(34): require_once(‘/var/www/vhosts…’) #4
/pathtoinstall/wp-admin/index.php(10): require_once(‘/var/www/vhosts…’) #5
{main} thrown in /pathtoinstall/wp-content/themes/enfold/functions.php on line 179

If this can be rectififed that would be great!

Thanks