I get the following error when I navigate to my site: http://sandnet.dmtez.com/wp-admin/ - all alone on a blank page.
Notice: Indirect modification of overloaded element of WP_Hook has no effect in /home/markj327/public_html/sites/sandnet/wp-content/plugins/snapshot/lib/WPMUDEV/Dashboard/wpmudev-dash-notification.php on line 58
I haven't been to this site for a couple of weeks, and then this pops up. What to check to troubleshoot?
FOLLOW UP: I disable WP_DEBUG switches in wp-config.php to remedy this. Seems to be generated by your code... can you tell me what caused this notice to prevent the site from loading? Recent WP 4.7 update maybe?