Error message when connecting to SP

[KlRiBr]

Hi

So I'm relatively new to Linux (Mint), so please be gental.
I installed mono
then I I entered in the terminal: sudo git clone https://github.com/suoko/spfilezilla.git
Then went into the diretory /home/backupfred/spfilezilla/bin/Debug and started SPFileZilla2013.exe with mono.

Program starts, I enter all necessery stuff (with and without domain):
Pressed Quickconnect and get this error message:
10:53:48 AM: Loading Site Lists...
10:55:30 AM: System.Net.WebException: The request timed out
at System.Net.HttpWebRequest.EndGetResponse (System.IAsyncResult asyncResult) [0x00052] in :0
at System.Net.HttpWebRequest.GetResponse () [0x0000e] in :0
at Microsoft.SharePoint.Client.Idcrl.IdcrlAuth.DoPost (System.String url, System.String contentType, System.String body, System.Func`2[T,TResult] webExceptionHandler) [0x0006b] in :0

The funny thing is, it does work rarly (lik,e 3 out of 60 times).
I guess I forgot to install some dependencies, but I don't know which and how