NotSupportedException: Must be able aggregate the response to spread them out across all plugins for /updatebuffer

[sbrl]

Hello,

Being fed up with Monodevelop, I decided to try Omnisharp in atom. I've impressed so far, but I've encountered this error:

An unhandled exception has occurred: Must be able aggregate the response to spread them out across all plugins for /updatebuffer
System.NotSupportedException: Must be able aggregate the response to spread them out across all plugins for /updatebuffer
  at OmniSharp.Middleware.Endpoint.EndpointHandler`2+d__19[TRequest,TResponse].MoveNext () [0x00030] in :0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0003e] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in :0 
  at OmniSharp.Middleware.Endpoint.EndpointHandler`2+d__16[TRequest,TResponse].MoveNext () [0x0025e] in :0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0003e] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in :0 
  at OmniSharp.Middleware.EndpointMiddleware+d__7.MoveNext () [0x000d8] in :0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0003e] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in :0 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in :0 
  at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware+d__6.MoveNext () [0x00080] in <54abb6e5c34d41e5b18eb3ce35092c5b>:0

Thoughts? I'm on Ubuntu 17.04, and have also filed #1004.