Issue is still ongoing.
Seems like WPMU_Updates (dashboard) is crashing the site.
Our adventures with reworking the members access to integrate with PWAL seems to have done something to the tables of the site as well. There are a number of errors where calls are being made to table that aren't properly defined.
These are the sorts of errors we're getting now.
Not sure if it's related but the timing raises suspicion
[Sat Mar 11 10:16:33.781800 2017] [:error] [pid 1035] [client 188.8.131.52:39558] WordPress database error Table 'trebuchet.wp_termmeta' doesn't exist for query SELECT term_id, meta_key, meta_value FROM wp_termmeta WHERE term_id IN (60,110,16,54,126,24,21,20,149,13,19,169,38,15,37,88,77,55,42,9,46,12,45,26,238,49,82,133,1199,174,259,36,53,79,80,211,94,40,43,564,31,114,92,217) ORDER BY meta_id ASC made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/mh-magazine/single.php'), get_footer, locate_template, load_template, require_once('/themes/mh-magazine/footer.php'), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, WP_Widget_Tag_Cloud->widget, wp_tag_cloud, get_terms, WP_Term_Query->query, WP_Term_Query->get_terms, update_termmeta_cache, update_meta_cache