You cannot log in to the game due to several reasons. 

First, your wireless network may be unstable, we recommend playing on a smooth network connection as much as possible. 

Additionally, update the game with the latest version of the patch update or reinstall the game. 

If the issue persists despite troubleshooting, please send us an inquiry through our Customer Support with the completed form below. We will do our best to help you resolve this issue. 

■ Information needed

• Server:
• Boss Name:
• Device Info:
• System Version:
• Time and frequency of the problem:
• A detailed description of the problem (Details and order of operation):
• Screenshots related to the issue or other feedback: