Failed to load launch URL with error: Error Domain=TVMLKitErrorDomain Code=3 "(null)" - swift

Question

Description:
I created a new TVML project and launched it. The first error was the App Transport Security, which I fixed via Info.plist :
App Transport Security Settings -> Allow Arbitrary Loads -> YES
Then I ran it again and I'm getting this error:
Failed to load launch URL with error: (null)
appController(_:didFailWithError:) invoked with error: Error
Domain=TVMLKitErrorDomain Code=3 "(null)"
The project seems to stop here (application func in AppDelegate.swift):
appControllerContext.launchOptions["BASEURL"] = AppDelegate.tvBaseURL
print(launchOptions) //returns nil
//error on following line
if let launchOptions = launchOptions as? [String: AnyObject] {
//does not enter here
for (kind, value) in launchOptions {
appControllerContext.launchOptions[kind] = value
}
}
What I've tried:
I attempted changing the tvBaseURL from "http://localhost:9001/" to http://MY-IP-ADDRESS-HERE:9001/
but that didn't change anything.
Question:
What is causing this error and how do I solve it?

Answer 1

You should start the server with port number
enter the following command in terminal
ruby -run -ehttpd . -p9001
And finally your tvBaseURL should navigate to the server folder like this
"http://yourLocalhost:9001/Downloads/TVMLCatalogUsingTVMLTemplates/Server/"

Answer 2

I also faced the same problem, I solved it by changing tvBaseURL in AppDelegate
static let tvBaseURL = "http://127.0.0.1:9001/Downloads/TVMLCatalogUsingTVMLTemplates/Server/"
As you see - I have to show exact path to Server folder. That also works if you put it to some web server.
Hope that it can help!

Answer 3

I just ran into this issue. You need to pay close attention to the terminal output.
I got:
[2019-03-15 12:28:43] INFO WEBrick 1.3.1
[2019-03-15 12:28:43] INFO ruby 2.3.7 (2018-03-28) [universal.x86_64-darwin17]
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/socket.rb:205:
in `bind': Address already in use - bind(2) for 0.0.0.0:9001 (Errno::EADDRINUSE)
Address already in use - bind(2) for 0.0.0.0:9001
At this point you either have to choose a different port number (if you decide to do such then make sure your server's port and your Xcode's project port match) or kill the previous server by ctrl + c or just killing that terminal window.
Also note in some of Apple's sample projects the ruby -run -ehttpd . -p9001 command is to be done in a folder named Server and for others it's just suppose to be done in the App's main folder. Just look into the README file to figure this out.