Hmm, I just ran the following command on the files you sent me:
qiime feature-table heatmap \
--i-table collapsed_table_level6.qza \
--m-metadata-file metadata_forum.tsv \
--m-metadata-column exacerb_kategori \
--p-normalize \
--p-cluster features \
--o-visualization heatmap-genus.qzv \
--verbose
I tried in 2019.1 and the development version of 2019.4 and it ran successfully to completion.
I wonder if your environment has had some modifications, specifically around some of the dependencies... Can you run conda list
and paste the results here?