Server with the specified hostname cannot be found

I just installed Servoy 8.0.1 and this is the first time I am using version 8 having tried until now to understand responsive design and AngularJs. When I tried to create my first form I received this message

http://localhost:8080/rfb/angular/index.html?s=test_ng&l=absolute&f=client&w=640.0&h=480.0&editorid=4d3f8e3b-583b-45ee-943c-5ddc1d8a2932&c_sessionid=devsession&replacewebsocket=true

Page load failed with error: A server with the specified hostname could not be found.

.
Could somebody tell me what this means? Thank you.

Are you running another Servoy developer instance on port 8080 at the same time??

No, there was no server working on port 8080. To be sure I also changed the default port to 8083, but got the same message (with port 8083 instead of 8080)

I see that nobody experienced my problem. So let me ask some questions that maybe someone can answer:
a) which server Servoy is supposed to find? I tried also to load the example solutions, but when trying to open a form in the form editor I get the same error message;
b) is the installer supposed to install some Angular components and where?
c) looking at webinars posted when Servoy 8 was launched I noticed that the editor interface has a menu on the left which I don’t find in my installation as you can see in the image below. Why I cannot see any menu in the form editor?

i think this is the macosx? What version exactly?

What errors do you see in the servoy_log.txt (in the application_server dir) or in your workspace dir: .metadata.log file (in mac they are default hidden)

The question is also how can it really not found the host: localhost? if you do “ping localhost” that should resolve to something
or is it just an exception somewhere else.

Thanks, solved. The hosts file was corrupted. I replaced it and now everything works as expected. What’s strange is that localhost was working correctly for other applications, mySQL for example but not for Servoy. Thank you anyway.