Bug: all versions of Picrust2 are failing with a technical error

Reported at https://help.galaxyproject.org/t/problem-on-picrust2-webtool-even-with-tutorial-files/11412/7

Testing history https://usegalaxy.eu/u/jenj/h/test-picrust

Example failure
https://usegalaxy.eu/datasets/4838ba20a6d8676528aec923c9f8199f/details
> Job API ID | 11ac94870d0bb33a803d19e3c1df4715
> OSError: [Errno 39] Directory not empty: '/data/jwd02f/main/077/837/77837181/tmp/tmpqbvmtb5p'