Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, string given in /var/www/html/wp-content/mu-plugins/pexlechris_adminer_avoid_conflicts_with_other_plugins.php:20
Stack trace:
#0 /var/www/html/wp-content/mu-plugins/pexlechris_adminer_avoid_conflicts_with_other_plugins.php(20): in_array('pexlechris-admi...', '')
#1 /var/www/html/wp-includes/class-wp-hook.php(343): {closure}('')
#2 /var/www/html/wp-includes/plugin.php(205): WP_Hook->apply_filters('', Array)
#3 /var/www/html/wp-includes/option.php(256): apply_filters('option_active_p...', '', 'active_plugins')
#4 /var/www/html/wp-includes/load.php(1015): get_option('active_plugins', Array)
#5 /var/www/html/wp-settings.php(545): wp_get_active_and_valid_plugins()
#6 /var/www/html/wp-config.php(140): require_once('/var/www/html/w...')
#7 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...')
#8 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...')
#9 /var/www/html/index.php(17): require('/var/www/html/w...')
#10 {main}
  thrown in /var/www/html/wp-content/mu-plugins/pexlechris_adminer_avoid_conflicts_with_other_plugins.php on line 20