( ! ) Fatal error: Uncaught Error: Call to undefined function is_main_site() in C:\wamp64\www\wp-includes\update.php on line 812
( ! ) Error: Call to undefined function is_main_site() in C:\wamp64\www\wp-includes\update.php on line 812
Call Stack
#	Time	Memory	Function	Location
1	0.0001	364072	{main}( )	...\update.php:0