Security problem with nonce

Hey there,

I am getting the message “Security problem with nonce” on the backend of my site in the lower left corner of my homepage below the footer. Also when I am logged it the top admin menu bar disappears when I try to view my homepage while logged in. All other pages work fine and the menu bar and security message are not present.

Additional context:
I was using the deploy mode on W3 total cache after I disabled Cloudfare to enable the minify option in the plugin. However I tried switching back to Cloudfare and disabling minify, but the problem still exists.

Any help would be appreciated.

Thanks.