QuACN package: getLargestSubgraph -> .validateGraph error

I am trying to create a network from the matrix that is attached.

matrixSelecionada <- read.csv("matrix.csv", header = FALSE)

matrixSelecionada <- data.matrix(matrixSelecionada)

## changing the values of the matrix

for (i in 1:nrow(matrixSelecionada)) {

for (j in 1:ncol(matrixSelecionada)) {
                        if (matrixSelecionada[i,j] < 0.01 || i==j) {
                        matrixSelecionada[i,j] <- 0
               } else if (matrixSelecionada[i,j]>=0.01) {
                        matrixSelecionada[i,j] <- 1
                }

                }
                }

g <- as(matrixSelecionada, "graphNEL")
g

A graphNEL graph with directed edges
Number of Nodes = 56
Number of Edges = 1256

glg <- getLargestSubgraph(g)

Error: .validateGraph(g) is not TRUE


But when I do validateGraph

validGraph(g)

[1] TRUE