GX-Entwicklung

https://telemetry.gambio-server.net/gambio/gx/issues/264009/

``` php
ErrorException: Notice: Undefined index: coo_debugger
  File "/system/core/caching/DataCache.inc.php", line 184, in DataCache::key_exists
    if(is_object($GLOBALS['coo_debugger']) && $GLOBALS['coo_debugger']->is_enabled('DataCache_disable_cache')) return false;
  File "/system/core/MainFactory.inc.php", line 323, in MainFactory::create_object
    if (self::$dataCache->key_exists($mainFactoryCacheName, true)) {
  File "/admin/includes/application_top.php", line 137, in require
    $coo_timezone_setter = MainFactory::create_object('TimezoneSetter');
  File "/admin/tax_rates.php", line 24

    require('includes/application_top.php');
```