pipeline can not find any stages source with pipeline templates

[yusha2016]

while a support to pipeline TestA and TesB, the TestB is configuration a auto Trigger job depends TestA, And the TestB pipeline is config with pipeline templates from remote source, while i work TestB pipeline with single , it can be worked ok, but while i work TestA first, the TestB work by trigger, it can not work ok error by can not find any stages