Error in out[1:k, ] : incorrect number of dimensions

[AlphaLX]

Hi, I use the scibetR package for windows system, and I met an error when using the package.

expr = as.data.frame(t(counts(ref))) # the reference dataset, rows are cells and columns are genes
expr = expr %>%
mutate(group_ref) # add the label column
que = as.data.frame(t(counts(sce))) # the query dataset, , rows are cells and columns are genes
prd <- SciBet_R(expr, que, k=100)

Error in out[1:k, ] : incorrect number of dimensions

I don't know what's wrong with my code, could you please help me solve the issue?