TYPO3 Exception 1232985914

Note

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The PHP extension "apcu" must be installed and loaded in order to use the APCu backend.

Install and configure apc on the server. Maybe APCu is installed, but needs more memory.
Goto TYPO3 Install Tool --> Configuration Presets and choose Database cache backend (or: something different then apcu) and save.
On a Hetzner server: Disable, save and then re-enable APC in Hetzner server management console to get it fixed.