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Hi team! I'm trying to upgrade my agent to use Prefect version `2.8.7` but I'm getting this error on the last step, which is to register the blocks:
```executor failed running [/bin/sh -c prefect block register -m prefect_gcp]: exit code: 1
ERROR: Service 'agent' failed to build : Build failed```
Have you seen this error before?

```FROM prefecthq/prefect:2.8.7-python3.8

COPY requirements.txt .
COPY setup.py .

RUN apt-get update &amp;&amp; apt-get install --yes libgdal-dev

RUN pip install --upgrade pip setuptools --no-cache-dir
RUN pip install --trusted-host <http://pypi.python.org|pypi.python.org> --no-cache-dir .

ARG PREFECT_API_KEY
ENV PREFECT_API_KEY=$PREFECT_API_KEY

ARG PREFECT_API_URL
ENV PREFECT_API_URL=$PREFECT_API_URL

ENV PYTHONUNBUFFERED True

COPY dataflows/flows/ /opt/prefect/flows/

RUN prefect block register -m prefect_gcp

ENTRYPOINT ["prefect", "agent", "start", "-q", "default"]```
This is my Dockerfile for reference

FYI fixed, I had a lower version of the `prefect_gcp` dependency, upgrading to `0.3.0` seems to have done the trick