Moin,
Tritt die Fehlermeldung an weiteren Stellen auf oder nur beim deaktivieren/entfernen?
Ich empfehle einen Blick ins PHP errorlog deines Webhosters – zu dem Zeitpunkt des Fehlers sollte dort ein Eintrag stehen, welchen du uns gerne mitteilen kannst 🙂
23593#0: *62974 FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught Error: Undefined constant "WC_PLUGIN_BASENAME" in /var/www/vhosts/mysite/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-install.php:226
Stack trace:
#0 /var/www/vhosts/mysite/httpdocs/wp-content/plugins/woocommerce/includes/class-wc-install.php(2184): WC_Install::init()
#1 /var/www/vhosts/mysite/httpdocs/wp-content/plugins/woocommerce/uninstall.php(37): include_once('...')
#2 /var/www/vhosts/mysite/httpdocs/wp-admin/includes/plugin.php(1241): include_once('...')
#3 /var/www/vhosts/mysite/httpdocs/wp-admin/includes/plugin.php(958): uninstall_plugin()
#4 /var/www/vhosts/mysite/httpdocs/wp-admin/includes/ajax-actions.php(4668): delete_plugins()
#5 /var/www/vhosts/mysite/httpdocs/wp-includes/class-wp-hook.php(307): wp_ajax_delete_plugin()
#6 /var/www/vhosts/mysite/httpdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
#7 /var/www/vhosts/mysite/httpdocs/wp-includes/" while reading response header from upstream
