Pipelines no longer working in dev server after updating to latest cloud sdk

I have a mapreduce pipeline that worked in SDK 122 that now fails in the dev server with the following error after updating to SDK 126:

Traceback (most recent call last):
  File "/vl/local/google-cloud-sdk/platform/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 570, in dispatch
    return method(*args, **kwargs)
  File "/Users/stanton/src/vlshare/appserver/src/vl/base.py", line 645, in wrapper
    return handler(*args, **kwargs)
  File "/Users/stanton/src/vlshare/appserver/src/vlops/handlers.py", line 319, in any
    result = func(self.request)
  File "/Users/stanton/src/vlshare/appserver/src/vlops/admin/files.py", line 301, in _getZone
    result = launchPipeline(GetZonePipeline(zone.key.urlsafe()))
  File "/Users/stanton/src/vlshare/appserver/src/vl/pipe_utils.py", line 62, in launchPipeline
    pipeline.start(base_path='/ops/pipeline')
  File "/Users/stanton/src/vlshare/appserver/src/lib/pipeline/pipeline.py", line 673, in start
    self, idempotence_key, str(e)))
PipelineSetupError: Error starting vlops.admin.files.GetZonePipeline(*('aghkZXZ-Tm9uZXIXCxIKWm9uZUVudGl0eRiAgICAgMCvCgyiAQZnbG9iYWw',), **{})#342c4ceab7084adfb389b35b45960fdd: 

As far as I can tell the pipeline is having problems submitting tasks to the task queue. Note that the pipeline is not running in the default service. Also, everything works as expected in the production environment, so this is specifically a problem with the dev server.

Any ideas? What additional logging would be helpful here?

[timmehmainframe]

This is fixed by: https://github.com/GoogleCloudPlatform/appengine-pipelines/commit/2f1930b0be21a40077676c6fc19a6b95801caa9e

[diogovk]

Indeed this is happening, and changing version to default works. (GoogleAppEnginePipeline version 1.9.22.1)

What would a definite solution to this problem would look like so I can make a PR?