task 3 failed - "Zero variances have been detected for the following taxa:

[elenagallina1]

Hi, when running ancombc2, I run into this error:

Error in { :
task 3 failed - "Zero variances have been detected for the following taxa:
70ddd4e534c929763ddd6e665e4b82e1
Please remove these taxa or select a more parsimonious model"
In addition: There were 50 or more warnings (use warnings() to see the first 50)

R version 4.5.2
ANCOMBC version 2.12.0

ancom_out <- ancombc2(
data = physeq_all_2_BG,
assay_name = "counts",
tax_level = "Genus",
fix_formula = "Genotype * Cycle",
rand_formula = NULL,
p_adj_method = "BH",
lib_cut = 1000,
struc_zero = TRUE,
group = "Genotype"
)