Fatal error after update

Hello,

After an update, WordPress encountered an error with the Cookie Notice & Compliance for GDPR / CCPA plugin. This is the error it shows:

<b style=”color: rgb(0, 0, 0); font-family: "Times New Roman"; font-size: medium; white-space-collapse: collapse;”>Fatal error</b><span style=”color: rgb(0, 0, 0); font-family: "Times New Roman"; font-size: medium; white-space-collapse: collapse;”>: Uncaught Error: Call to undefined function array_key_first() in /home/cicompreuf/www/wp-content/plugins/cookie-notice/includes/settings.php:137 Stack trace: #0 /home/cicompreuf/www/wp-includes/class-wp-hook.php(286): Cookie_Notice_Settings->load_defaults(”) #1 /home/cicompreuf/www/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 /home/cicompreuf/www/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /home/cicompreuf/www/wp-settings.php(451): do_action(‘after_setup_the…’) #4 /home/cicompreuf/www/wp-config.php(92): require_once(‘/home/cicompreu…’) #5 /home/cicompreuf/www/wp-load.php(37): require_once(‘/home/cicompreu…’) #6 /home/cicompreuf/www/wp-admin/admin.php(31): require_once(‘/home/cicompreu…’) #7 /home/cicompreuf/www/wp-admin/plugins.php(10): require_once(‘/home/cicompreu…’) #8 {main} thrown in </span><b style=”color: rgb(0, 0, 0); font-family: "Times New Roman"; font-size: medium; white-space-collapse: collapse;”>/home/cicompreuf/www/wp-content/plugins/cookie-notice/includes/settings.php</b><span style=”color: rgb(0, 0, 0); font-family: "Times New Roman"; font-size: medium; white-space-collapse: collapse;”> on line </span><b style=”color: rgb(0, 0, 0); font-family: "Times New Roman"; font-size: medium; white-space-collapse: collapse;”>137</b>

Thanks for your help.

(I have now temporarily deactivated the plugin, to allow the site content to be updated)