Commented out WP_CACHE definition in wp-config.php being incorrectly ignored · Issue #591 · wpsharks/comet-cache · GitHub
define( "WP_CACHE", true ); is not in wp-config.php. Either click "Attempt Fix" or add the code manually. Attempt Fix · Issue #95 · tlovett1/simple-cache · GitHub
cache enabler activation not adding define('WP_CACHE', true); · Issue #65 · keycdn/cache-enabler · GitHub
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