Error kraken exchange

[Blade]

Hello,
Here the console error:

Code:

  --> POST /api/getCandles 200 300ms 9.91kb
  --> POST /api/getCandles 200 285ms 9.91kb
RECEIVED ERROR IN GEKKO 924062155399679


Gekko encountered an error and can't continue


Gekko encountered an error and can't continue

Error:

[kraken.js] API:Invalid nonce

Meta debug info:

Gekko version: v0.5.11
Nodejs version: v8.9.4

I'm using the dev branch. Any ideas ?
Thank you !