Decontam analysis

Hi, I need some help with my analysis.
I'm trying to plot the frequency of contaminants with Decontam but I have some errors:
Error in data.frame(..., check.names = FALSE) :
arguments imply differing number of rows: 64, 67
In addition: Warning message:
In plot_frequency(physeq1, taxa_names(physeq1)[c(1, 96)], conc = "QUANT_READING") :
Removed 3 samples with zero total counts (or frequency).
The error in the data frame occurred because in the previous step the program exclude 3 samples with 0 reads and now the data do have not the same quantity of rows. How can I fix that to proceed with the analysis?
Thank you so much!