Error in sample.int(length(x), size, replace, prob) : invalid first argument

[jacobHog]

Hi,

I am attempting to use your tool to create a signature matrix for deconvolution of bulk-rna sequencing data, but I am running into the error of the title (Error in sample.int(length(x), size, replace, prob) : invalid first argument).

My expression and meta data is stored locally as .txt files, and I loaded the data using read.table.
The data looks as such:

sig_exp[1:3, 1:3]
      1772094169_G10 1772072247_E09 1772094174_H05
Xkr4               0              0              0
Rp1                0              0              0
Sox17              0              0              0

sig_meta[1:3, 1:4]
         Cell_ID Cell_type Timepoint Total_Molecules
1 1772094169_G10    mPeric     E12.5            7874
2 1772072247_E09    mPeric     E18.5            3701
3 1772094174_H05    mPeric     E14.5            2878

However, when attempting to use the code:

geps <- aggregateGEP(
  sig_exp, 
  sig_meta, 
  cell_types = names(table(sig_meta$Cell_type)),
  celltype_column = "Cell_type",
  scale_factor = 10000,
  num_gep = 5,
  verbose = TRUE
)

I get the error message of the title.
Can you help me to debug this error?
Thank you very much