# Known Problems

For any unanswered questions or problems, see Support and Contact.

## Requests-related ImportErrors

> ImportError: No module named packages.urllib3.poolmanager

> ImportError: cannot import name iter_field_objects

Debian and nowadays even other distros make modifications to the `requests` package that don’t play well with packages assuming a normal `requests`. This is due to stubbornness on both sides.

See issue #82 and issue #140 for past discussions. You have one option to work around this, that is, to install vdirsyncer in a virtualenv, see Manual installation.