New answers tagged plugin-w3-total-cache
This is a feature. You can try to disable caching for logged in users, but if it is in the main nav this still won't help as according to the settings screen: Don't cache pages for logged in users Unauthenticated users may view a cached version of the last authenticated user's view of a given page. Disabling this option is not recommended. ...
Without looking at code, going by that error message it's likely more of "strict" check and bad coding practice that error. Note that you don't have to use Object Cache via W3TC, you can just use different implementation for it. APC Object Cache Backend is long available and battle-tested.
For database caching you should try Memcached instead, in PHP 5.5, APC for W3 Total Cache will not work like for 5.4 or 5.3.
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