How to fix error rc=-4 in esp8266 using arduino ide [closed] - esp8266

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IP address: 192.168.254.118
Attempting MQTT connection...
failed, rc=-4 try again in 5 seconds
Attempting MQTT connection...
failed, rc=-4 try again in 5 seconds
Attempting MQTT connection...
i cannot connect to my HiveMQ account. I already change the username and password. but still error rc=-4.
anyone can help me?
explaination and guide about the error and how to fix it.

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Thanks a lot:
Daniel
This doesn't seem to be a question related to programming/development. I think Server Fault would be a better place for this question.

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Hi I'm using a cisco client to connect by vpn. The client tell me that connection is established but now how can I see the folder into the server?
Once connected to your VPN network using your Cisco VPN client :
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I want to retrieve or set the value of the (unsynced) clock of my goprohero 3 silver edition programmatically through wifi.
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