Fatal error when going to update section

When clicking on updates in admin panel, following error occurs:


Fehler-Details

==============

Ein Fehler vom Typ E_ERROR wurde in der Zeile 878 der Datei /var/www/vhosts/example.de/httpdocs/wp-content/plugins/woocommerce-ajax-filters/berocket/includes/updater.php verursacht. Fehlermeldung: Uncaught TypeError: Cannot access offset of type string on string in /var/www/vhosts/example.de/httpdocs/wp-content/plugins/woocommerce-ajax-filters/berocket/includes/updater.php:878

Stack trace:

#0 /var/www/vhosts/example.de/httpdocs/wp-includes/class-wp-hook.php(326): BeRocket_updater::update_check_set()

#1 /var/www/vhosts/example.de/httpdocs/wp-includes/plugin.php(205): WP_Hook->apply_filters()

#2 /var/www/vhosts/example.de/httpdocs/wp-includes/option.php(2610): apply_filters()

#3 /var/www/vhosts/example.de/httpdocs/wp-includes/update.php(393): set_site_transient()

#4 /var/www/vhosts/example.de/httpdocs/wp-includes/class-wp-hook.php(324): wp_update_plugins()

#5 /var/www/vhosts/example.de/httpdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()

#6 /var/www/vhosts/example.de/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action()

#7 /var/www/vhosts/example.de/httpdocs/wp-admin/admin.php(385): do_action()

#8 /var/www/vhosts/example.de/httpdocs/wp-admin/update-core.php(10): require_once('...')

#9 {main}

 thrown

Disabling the plugin solves the issue