Plugin error from diversity:
Weighted UniFrac is not parallelizable
Debug info has been saved to /tmp/qiime2-q2cli-err-ohnrm9rv.log
I do not get the same error when using the same command but leaving out --p-n-jobs 20
This appears to be a bug, where qiime diversity core-metrics-phylogenetic is trying to provide the weighted unifrac function with multiple threads, but the function throws an error.
Thanks for the bug report @nick-youngblut! We recently refactored the core-metrics* methods to become pipelines, and looks like this regression crept in!
I have opened an issue on the relevant issue tracker. Stay tuned!