Hi, I just upgraded Dagster to the latest version (I am hosting it myself on Kubernetes). Everything was working fine for a few hours and all of a sudden I am getting this error whenever I try to load my pipeline runs. Does anyone know why this happens and how I can fix it?

Operation name: PipelineRunsRootQuery

Message: Cannot return null for non-nullable field Run.mode.

Path: ["pipelineRunsOrError","results",0,"mode"]

Locations: [{"line":29,"column":3}]

Stack Trace:

File "/usr/local/lib/python3.7/site-packages/graphql/execution/execute.py", line 541, in execute_field

return_type, field_nodes, info, path, result

File "/usr/local/lib/python3.7/site-packages/graphql/execution/execute.py", line 621, in complete_value

"Cannot return null for non-nullable field"

This looks like your dagit and user code server might be out of sync. Did you also upgrade dagit to the latest version?

That was the problem 🙂 I updated Dagit through helm and everything worked after, thanks!