hi community, I'm running into a very simple but confusing error: • I create a new environment with

conda create -n my-env python=3.10

• I activate the environment and only instal prefect with

pip install -U prefect

• Finally I try to set the prefect server to the right IP using

prefect confit set PREFECT_API_URL=<http://XX.XX.XX.XXX:4200>

The following error pops up:

AttributeError: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'

. Has anyone seen this error before and can provide guidance?

What is the full traceback that raised the error? I have not seen this error, and it is not clear if it is actually being raised by prefect. It might be some conda magic that is being mucked up.

hey @Tim Galvin thanks for chiming in. This is the complete traceback:

Original exception was:
Traceback (most recent call last):
  File "/home/gtfs-rt-conflation/.local/bin/prefect", line 5, in <module>
    from prefect.cli import app
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/prefect/__init__.py", line 25, in <module>
    from prefect.states import State
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/prefect/states.py", line 28, in <module>
    from prefect.results import BaseResult, R, ResultFactory
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/prefect/results.py", line 9, in <module>
    from prefect.blocks.core import Block
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/prefect/blocks/__init__.py", line 3, in <module>
    import prefect.blocks.notifications
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/prefect/blocks/notifications.py", line 4, in <module>
    import apprise
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/apprise/__init__.py", line 51, in <module>
    from .plugins.NotifyBase import NotifyBase
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/apprise/plugins/__init__.py", line 34, in <module>
    from . import NotifyEmail as NotifyEmailBase
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/apprise/plugins/NotifyEmail.py", line 40, in <module>
    from .NotifyBase import NotifyBase
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/apprise/plugins/NotifyBase.py", line 36, in <module>
    from ..AppriseAttachment import AppriseAttachment
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/apprise/AppriseAttachment.py", line 26, in <module>
    from . import attachment
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/apprise/attachment/__init__.py", line 116, in <module>
    __load_matrix()
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/apprise/attachment/__init__.py", line 56, in __load_matrix
    module = __import__(
  File "/home/gtfs-rt-conflation/.local/lib/python3.8/site-packages/apprise/attachment/AttachHTTP.py", line 28, in <module>
    import requests
  File "/usr/lib/python3/dist-packages/requests/__init__.py", line 95, in <module>
    from urllib3.contrib import pyopenssl
  File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 46, in <module>
    import OpenSSL.SSL
  File "/usr/lib/python3/dist-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import crypto, SSL
  File "/usr/lib/python3/dist-packages/OpenSSL/crypto.py", line 1553, in <module>
    class X509StoreFlags(object):
  File "/usr/lib/python3/dist-packages/OpenSSL/crypto.py", line 1573, in X509StoreFlags
    CB_ISSUER_CHECK = _lib.X509_V_FLAG_CB_ISSUER_CHECK
AttributeError: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'

My pleasure 🙂 This to me does not look like a prefect error, and instead is probably related to SSL and the interplay with the conda environment and your host system

agreed, you probably need to upgrade pip, openssl, and conda

Thanks, I'll give it a shot at upgrading conda