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 @Niko Usai! What is the version of your server/agent/flow?

hi server is the cloud one agent is

prefecthq/prefect:0.13.9-python3.6

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

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