[gekko 0.6] API change for running a backtest

[thegamecat]

I'm checking what's in "this" in Koa context.js (where the error is) - line 105 and I see this on the server side which seems a bit strange to me:

xxx POST /api/backtest 500 195ms -
{ request:
  { method: 'POST',
    url: '/api/backtest',
    header:
     { 'content-type': 'application/json',
       host: '127.0.0.1:3001',
       accept: 'application/json',
       'content-length': '1349',
       connection: 'close' } },
 response:
  { status: 404,
    message: 'Not Found',
    header:
     { 'access-control-allow-origin': '*',
       'access-control-allow-methods': 'GET,HEAD,PUT,POST,DELETE' } },
 app: { subdomainOffset: 2, proxy: false, env: 'development' },
 originalUrl: '/api/backtest',
 req: '<original node req>',
 res: '<original node res>',
 socket: '<original node socket>' }

 Error: non-error thrown: Child process has died.
     at Object.onerror (/mnt/d/bash/gekko/node_modules/koa/lib/context.js:106:40)
     at <anonymous>
     at process._tickCallback (internal/process/next_tick.js:188:7)