if (!$mask) {
            file_put_contents($pathname, $message . "\n", FILE_APPEND);

file_put_contents [internal], line ??
Cake\Log\Engine\FileLog::log() /var/www/cake/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php, line 140
Cake\Log\Log::write() /var/www/cake/vendor/cakephp/cakephp/src/Log/Log.php, line 392
Cake\Log\Log::warning() /var/www/cake/vendor/cakephp/cakephp/src/Log/Log.php, line 477
DebugKit\ToolbarService::isSuspiciouslyProduction() /var/www/cake/vendor/cakephp/debug_kit/src/ToolbarService.php, line 173
DebugKit\ToolbarService::isEnabled() /var/www/cake/vendor/cakephp/debug_kit/src/ToolbarService.php, line 107
DebugKit\Plugin::bootstrap() /var/www/cake/vendor/cakephp/debug_kit/src/Plugin.php, line 50
Cake\Http\BaseApplication::pluginBootstrap() /var/www/cake/vendor/cakephp/cakephp/src/Http/BaseApplication.php, line 182
Cake\Http\Server::bootstrap() /var/www/cake/vendor/cakephp/cakephp/src/Http/Server.php, line 111
Cake\Http\Server::run() /var/www/cake/vendor/cakephp/cakephp/src/Http/Server.php, line 79
include /var/www/cake/webroot/index.php, line 40
[main] /var/www/tw-surugaseiki/index_cake.php, line 2