For the alfresco server you must enter your ip address and eventually the port, not the whole url.
Exemple : you use http://126.96.36.199:8080/alfresco. Then you enter "188.8.131.52:8080"
But since I see that you use https, I'm affraid that it won't work. The zimlet is configured with http address.
You can modify it by editing the zimlet. For that, do the following :
-Unzip the com_starxpert_savealfresco.zip
-Edit the file saveAlfresco.jsp
-Change the line 809 :
WebServiceFactory.setEndpointAddress("http://" + servAl + "/alfresco/api");
-Zip all the files in a new file com_starxpert_savealfresco.zip
WebServiceFactory.setEndpointAddress("https://" + servAl + "/alfresco/api");
-Deploy this new zimlet.