Can't make pyensembl work on a virtual machine

[EmilioKolo]

Hi,

I've been running pyensembl on WSL for a while now and I needed to test some scripts on a Linux environment, so I used a virtual machine.

I tried a fresh install on Ubuntu 20.04.6 and Ubuntu 22.04.5, and tried running pyensembl 2.3.13 or 2.3.12.

Pyensembl installs without any apparent error but it does not work when trying to run the script in the virtual environment in which I installed it.

In all cases I got the following error:

RuntimeWarning: Missing required CPU features.

The following required CPU features were not detected:
    popcnt
Continuing to use this version of Polars on this processor will likely result in a crash.
Install the 'polars-lts-cpu' package instead of 'polars' to run Polars with better compatibility.

Installing polars-lts-cpu doesn't change the error. Uninstalling Polars and installing polars-lts-cpu throws a different error:
AttributeError: module 'polars' has no attribute 'Categorical'
Any help will be appreciated.