Hi @danielsebas
Sounds like QIIME 2 couldn't find the temporary files from this command (read on)...
That is probably the answer why! I suspect your host OS "cleaned up" some of the temporary files too soon. We don't see that often, but it does come up every now and then (macOS is usually the culprit, though).
What was the command you ran? Copy and paste please. One workaround is to re-run, but after setting the $TMPDIR env var to another (non-os owned) location. As well, I wonder if we can speed the command up by setting some --p-n-threads...
:qiime2: