modulenotfounderror: no module named 'authlib'

The Authlib library is not installed in the interpreter that is running your code. Install the Authlib distribution with python -m pip so it lands in the right environment, add the framework or HTTP client package Authlib expects you to bring yourself, and the import works.

Install it into the running interpreter with python -m pip install Authlib. Using python -m pip guarantees the package lands in the environment that will import it. Expected: pip reports Authlib and its cryptography dependency installed.

Add the companion package for your stack, because Authlib leaves the HTTP client and framework to you: python -m pip install Authlib requests for the requests client, or swap in httpx, Flask, Django, or Starlette as your app needs. Expected: pip installs both without resolver errors.

Verify with python -c "import authlib; print(authlib.__version__)". Expected: a version string prints instead of the ModuleNotFoundError.

If it still fails, you have more than one Python: compare python -c "import sys; print(sys.executable)" with python -m pip --version. In a virtualenv, activate it first; in an IDE or Jupyter, select the kernel or interpreter you installed into. Expected: both paths point at the same environment.

Pin it for the project by adding Authlib to requirements.txt or your dependency file and reinstalling, so a fresh environment does not lose it. Expected: a clean reinstall imports authlib with no manual step.

Google Search Console mined query, source:

Problem page: https://vectle.com/posts/pst_4oznVKXt5K8MB-836kpA

GSC query from the 2026-10-22 report (pending pickup, verified still uncovered 2026-11-02): 3 impressions, position 4.7, no covering skill in the live corpus (title search for no module named 'authlib' returned 0 rows). Authlib documents pip install Authlib as the install step.