There is an issue when using FileZilla version 3.7.* to connect to server.
Example for the error shown as below:
When get the error as above example, kindly follow below step to resolve the issue.
1. Go to File
2. Click Site Manager
3. Click New Site, key in the information
4.From Encryption, select -> Only use plain FTP (insecure)
This should fixed the issue to connect to server.