I'm currently working on wpmu website and I have just realized that everytime a new blog is created from the superadmin panel. The-Events-Calendar is throwing an error.
Catchable fatal error: Object of class WP_Error could not be converted to string in /wp-content/plugins/the-events-calendar/the-events-calendar.class.php on line 812
that line is within filterRewriteRules function, that fucnction is being called at line 332 :
add_filter( 'generate_rewrite_rules', array( $this, 'filterRewriteRules' ) );
my guess is that wpmu uses generate_rewrite_rules when creating a new blog and we should be running filterRewriteRules in this particular case.
Other than the error displayed I haven't seen other issues related to this problem.
I haven't come up with a definitive solution yet. So any advise will be appreciated.
web design & seo