Please see the release notes for v3.1 and let us know if following the install/upgrade instructions there helps to resolve your error:
https://forum.biobakery.org/t/announcing-metaphlan-3-1-and-humann-3-1/3881/2
Please see the release notes for v3.1 and let us know if following the install/upgrade instructions there helps to resolve your error:
https://forum.biobakery.org/t/announcing-metaphlan-3-1-and-humann-3-1/3881/2