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Hi everyone
I've got a prefect agent running on a Kubernetes cluster for a year or so and everything was fine, then it started to give me this error few days ago, without any change in anything:
```[2021-05-07 08:16:03,101] ERROR - agent | Error while deploying flow: ValidationError({'_schema': 'Invalid data type: None'},)```
I've tried to search, but couldn't find any hint on what to look,
anyone could help?

Hi <@U01CFS2F5FZ>! What is the version of your server/agent/flow?

hi server is the cloud one
agent is `prefecthq/prefect:0.13.9-python3.6`

prefect lib of the flow `prefect==0.14.17`

I’m not 100% this will solve the issue but in general server/agent versions should be at least as high as the flow

And the mismatch causes a bunch of errors

ok I'll try that, I should have thought about it :smile: