These error codes refer to your Firewall blocking a MapleStory 2 page.
To resolve this, please temporarily disable your Firewall before launching MapleStory 2. You can also add an exception to your firewall to the following page: ugc.maplestory2.nexon.net
Should the error persist, then please adjust your Internet Options:
- Open Control Panel
- Locate and click on "Internet Options"
- Navigate to the Advanced tab
- Search through the Settings and locate a Security option for "Do not save encrypted pages to disk"
- Un-check this checkbox
- Click on "Apply" and "OK" to save changes