Request for help with issues running tox with poetry

[ThaMe90]

I am running into a flaky behavior with running tox with poetry.
At my job, we have just upgraded to Python 3.13 (either from 3.11 or 3.12), and have regenerated our virtual enviroments with poetry to use the new python version.
However, without changing anything to our pyproject.toml or tox.ini files (except for the obvious version changes), we are now running into an issue when executing tox with poetry.

We have a project director project_dir somewhere on the filesystem, which contains the pyproject.toml & the tox.ini files.
When running poetry run tox from within project_dir, it eventually fails on finding the pyproject.toml file for the project.
However, the weird thing is, it fails with a RuntimeError:

RuntimeError: Poetry could not find a pyproject.toml file in C:\Windows or its parents

It is unclear to me why it is only looking in C:\Windows and its parents, while poetry is being executed from the project_dir.
I know this is a very contrived description, but providing any more information at this point would mean scrubbing a lot of data/names. I can probably do it if it is necessary.

An interesting detail is that this happens on a couple of workstations, but not all. Some coworkers have no issues at all, while me & at least another one do run into this.

[Secrus]

Without configs, files and some sort of reproducible example, there is nothing we can do to help.

[ThaMe90]

This was most likely caused by older version(s) of poetry being installed at the same time. I cleared my poetry cache, did a pip uninstall & a pip install of poetry, and my issues were gone.