The job was canceled because "ubuntu-latest_3_12" failed.

The process '/home/runner/miniconda3/condabin/mamba' failed with exit code 1

The 'defaults' channel might have been added implicitly. If this is intentional, add 'defaults' to the 'channels' list. Otherwise, consider setting 'conda-remove-defaults' to 'true'.

error libmamba Could not solve for environment specs The following package could not be installed └─ matplotlib =3.10.0 * does not exist (perhaps a typo or a missing channel).