Render is a platform as a service company that makes it easy to quickly deploy small apps. They have an easy-to-use free tier and I wanted run a Python app with dependencies managed by Poetry. Things had been going pretty well until I unexpectedly got the following error after a deploy

Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

You don’t have to search for too long to find out this isn’t good. I tried changing the PYTHON_VERSION and POETRY_VERSION to no avail. I also read a few threads on With nothing much else I could think of trying, I happened to find the Clear build cache & deploy sub-option under Manual Deploy. Fortunately for me, running that fixed my issue. Hopefully, this helps save someone time.