The Funnel Flux cache folder is not writable by the PHP script or doesn't have enough permissions to perform saving of the session file to the cache directory.
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Server location of the cache folder: FUNNEL_FLUX_INSTALLATION_DIRECTORY/cache 

To check if your account license key is LOCKED. Go to your member's dashboard; then you will see next to your license domain the Action labeled option as "LOCKED".
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​https://www.funnelflux.com/members-dashboard/
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The possible reason that your license is LOCKED is that you don't have an active subscription.
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​Note: A FunnelFlux support staff will need to manually unlock LOCKED accounts in cases where the subscription is active, as this may be a technical error with our systems. In this case, please create a support ticket to request unlocking.
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