Fatal error — array_merge(): Argument #1 must be of type array, bool given

[Garry]

Hi! It’s been resolved in WP Cerber 9.9

We implemented an automatic backup and recovery mechanism for the plugin settings. WP Cerber now maintains a last-known-valid copy of its configuration. If the primary settings stored in the WordPress DB become corrupted, the plugin automatically restores the valid state instead of throwing a fatal error on PHP 8+.

Thanks again for reporting this!

WP Cerber 9.9 is out

This release focuses on two areas that matter when something goes wrong: preserving a valid plugin configuration and detecting more forms of obfuscated JavaScript in incoming requests. It also improves compatibility with hosting environments that do not provide the mysqlnd database driver. Automatic backup and recovery for plugin settings WP Cerber now keeps a last-known-valid backup of its settings. The backup is refreshed after successful settings updates, imports, plugin upgrades, and daily…