Hi Alejandro,
The next thing is to check your HANA Studio proxy settings, by choosing Window -->Preferences--> General-->Network Connections.
If you are connecting using a proxy, you must have enabled the HTTP/HTTPS schema and provided the correct proxy settings. Make sure you configure the connection to the right AWS domain.
Choose Manual from the Active Provider list, then click on HTTP/HTTPS and choose Edit.
The default ports are 8080 for HTTP and 8443 for HTTPS.
Make sure you fill "Native" as the provider, the rest is depending on your proxy at your company.
If you don't use the proxy (ie home), then disabled the HTTP/HTTPS schema by choosing "Direct" as the provider.
I hope this will solve your problem.