basically, I am a new qiime2 user. I stucked at the point after denoising, which I did with dada, deblur and vsearch producing visualizable tables. Unfortunately, when I try to do phylogenetic analysis or taxonomy assignment of my ASVs I always encountered this error: “BAD REQUEST - <class ‘qiime2.core.type.grammar.UnionExp’> object has no attribute ‘decode’” with graphical user interface.
May you help me? thank you in advance.