Chelsey

Thanks for the info, but I’m not exactly sure how that helps me…

To give you a fuller picture of the situation, users logged into WP do not see the toolbar and receive an error message on pages only while the W3 Total Cache plugin is enabled since I updated. As soon as the plugin is disabled, the toolbar appears correctly across the site. Posts do not have the same problem (that is to say, the toolbar appears when viewing the blog section of our site).

What actions do you recommend?

(My second post regarding cache engine errors was solved with this answer: https://www.ads-software.com/support/topic/incorrect-cache-engine?replies=6)

Further errors appear when we try to make updates to the site (after clicking ‘Update’ on a post/page entry):

Warning: Incorrect cache engine in /…/public_html/wp-content/plugins/w3-total-cache/lib/W3/Cache.php on line 76

Warning: Cannot modify header information – headers already sent by (output started at /…/public_html/wp-content/plugins/w3-total-cache/lib/W3/Cache.php:76) in /…/public_html/wp-includes/pluggable.php on line 876

Edits do appear to go through, but something is clearly wrong here…