Example in Tutorial page 42 or PE-SCAn perspective plot could not be reproduced due to error "mfrow" has the wrong length

[usernicai]

I following the code chunk example in PE-SCAn ，and i've got my own super-enhancer data,
my code likes:
TNBC_SE_OUT <- PESCAn(list(HMEC_40kb_cool,BT549_40kb_cool,HCC70_40kb_cool,MB231_40kb_cool), bed = HMEC_SE[,2:4])
persp(TNBC_SE_OUT, border = NA,
cex.axis = 0.6, cex.lab = 0.6)
but throws an error like:
"Error in par(mfrow = seq_len(dim(mat)[3])) :
graphical parameter "mfrow" has the wrong length"
I just want to reprodecue the PE-SCAn perspective plot about super-enhancer