Error: Null when saving

Permalink
I recently upgraded one of my sites to 5.7.5.13. Now, on save, we get an error box with one word in it: "Null."
When I refresh the page, the change stands. However, it causes our average users to lose confidence in the system.

Our users also report that they are automatically logged off when they save a page.

I did a search and found no mention of this. Any ideas?

yfsneals
 
ConcreteOwl replied on at Permalink Reply
ConcreteOwl
If your host company has deployed 'Varnish' cache on the server, turn it off in the control panel (software section).
Or ask your host admin to do it for you..
yfsneals replied on at Permalink Reply
yfsneals
The unvarnished truth is, no Varnish here (and I can't get the pun out of my head-apologies for sharing). We're checking with the proxy servers.
yfsneals replied on at Permalink Reply
yfsneals
Just experienced Error: Null on a 5.7.5.6 site on the same server. Haven't heard back on the Varnish yet....
yfsneals replied on at Permalink Reply
yfsneals
Solved:
During a security check, x-frames were set to "DENY" to prevent clickjacking. They need to be set to "SAMEORIGIN" - this also provides clickjacking protection but allows the site to frame itself.