Maybe it's my poor understanding but I just did something like this from my local terminal:

with Flow("thinknum-etl") as flow:

    token = token_task(
        version=version
    )

    t = print_value(token)

storage = Docker(
    image_name='flows-storage',
    image_tag='latest',
    dockerfile='./dockerfiles/thinknum/Dockerfile',
    local_image=True,
    env_vars=envs
)

flow.storage = storage

security = Security(tls_ca_file='certs/myca.pem',
                    tls_client_cert='certs/myca.pem',
                    tls_client_key='certs/mykey.pem',
                    require_encryption=True)
flow.environment.executor = DaskExecutor(address='<IP Address>', client_kwargs={'security': security})
flow.register(project_name='thinknum-etl', build=False)

Didn't get any any errors after registering the flow. Then I asked how to debug locally without using the UI, and was advised to run this:

from prefect import Flow
my_flow = Flow.load('thinknum-etl')
my_flow.run()

I imagine I am doing this incorrectly.