I've been using Prefect for years now, and have been on Prefect 2 since it came out. I'm currently experiencing this insanely frustrating error when running a new prefect agent. I've tried it both on this VM we have on our corporate network, as well as locally, running prefect v2.8.7. My PREFECT_API_URL and PREFECT_API_KEY (not expired) are set as environment variables. But the agent keeps crashing and is stuck in this iterative loop. Does anyone know how to solve this?

___ ___ ___ ___ ___ ___ _____     _   ___ ___ _  _ _____
 | _ \ _ \ __| __| __/ __|_   _|   /_\ / __| __| \| |_   _|
 |  _/   / _|| _|| _| (__  | |    / _ \ (_ | _|| .` | | |
 |_| |_|_\___|_| |___\___| |_|   /_/ \_\___|___|_|\_| |_|


Agent started! Looking for work from work pool 'susilceimpwssx2'...

Failed the last 3 attempts.  Please check your environment and configuration.
Examples of recent errors:

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/httpx/_transports/default.py",
line 60, in map_httpcore_exceptions
    yield
  File "/usr/local/lib/python3.9/site-packages/httpx/_transports/default.py",
line 353, in handle_async_request
    resp = await self._pool.handle_async_request(req)
  File
"/usr/local/lib/python3.9/site-packages/httpcore/_async/connection_pool.py",
line 208, in handle_async_request
    raise UnsupportedProtocol(
httpcore.UnsupportedProtocol: Request URL is missing an 'http://' or 'https://'
protocol.

Agent stopped!

Could you edit you message and move the error to inside the thread? Make the channel less polluted, thanks 🙂

you sure your api_url is correct and includes https?

positive. I've used this same url for agents that are currently running on Azure Containers and on Rancher on another server, they work fine

is this after the 2.8.7 upgrade?

Can you run a flow without the agent on the machine that throws this error?

@Joseph Loss Did you manage to find a fix to this problem? I'm encountering the same one when trying to running an agent on ECS.