Assigning jobs to pipeline engine; buildinfo result failure

Hi there
i noticed that on my rancher v 2.1.4 when i create some pipelines and its large, rancher will raise an error on pipelines.
Error is : Assigning jobs to pipeline engine; buildinfo result failure.
There is no error on YML syntax
i reported this as well into git hub issues but until now there is no response from anyone

for more info here is the URL of git hub topic :