Switching language mode to Python on an unsaved file throws "Module path should be rooted" #597

Completions in untitled:Untitled-1 at (0, 8)
[Error - 10:40:55 AM] Request textDocument/completion failed.
  Message: One or more errors occurred. (Module path should be rooted)
  Code: -32000 
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at Microsoft.Python.LanguageServer.Implementation.Server.GetAnalysis(Uri uri, CancellationToken cancellationToken) in C:\Users\jabaile\python-language-server\src\LanguageServer\Impl\Implementation\Server.Documents.cs:line 72
   at Microsoft.Python.LanguageServer.Implementation.Server.Completion(CompletionParams params, CancellationToken cancellationToken) in C:\Users\jabaile\python-language-server\src\LanguageServer\Impl\Implementation\Server.Editor.cs:line 35
   at Microsoft.Python.LanguageServer.Implementation.LanguageServer.Completion(JToken token, CancellationToken cancellationToken) in C:\Users\jabaile\python-language-server\src\LanguageServer\Impl\LanguageServer.cs:line 238