I recently moved my site to a new host and I been having problems with the multi site ever since. I originally installed YD Network-wide Options plugin and had a message to upgrade the plugin. When I upgraded I got the following error
Fatal error: Call to undefined function switch_to_blog() in /home/timeoutb/public_html/wp-content/plugins/yd-wpmu-sitewide-options/yd-wpmu-sitewide-options.php on line 715
I couldn't do anything on the site and had to delete the plugin via ftp. I tried installing from scratch but still get the same error.
Can some please advise if this is the correct plugin for Multi site development and what the problem could be?