I’d check out the search bar feature in the qiime2 forums – it is actually really nifty.
The problem you see here is probably similar to the below posts.
https://forum.qiime2.org/t/integer-division-or-modulo-by-zero-error/3620/17
https://forum.qiime2.org/t/yet-more-trouble-with-gneiss/2692/20
https://forum.qiime2.org/t/gneiss-nan-plugin-error/2880/8
https://forum.qiime2.org/t/gneiss-balances-zero-values-for-model-mse/2176/15
https://forum.qiime2.org/t/gneiss-zero-balance-error/1857/13
https://forum.qiime2.org/t/gneiss-zero-balance-error/1857/13