I downloaded “SILVA_138.1_LSURef_NR99_30_06_20_opt.arb.gz” from the arb-silva website to use as the classifier for 18S protozoa data in qiime2 2019.10.
qiime feature-classifier classify-sklearn
(1/1) Invalid value for “–i-classifier”:
‘SILVA_138.1_LSURef_NR99_30_06_20_opt.arb’ is not a QIIME 2 Artifact (.qza)
Is there some type of way to convert the classifier file from .arb to .gza? Or is there somewhere else I need to download the LSU reference from?