Trying to calculate methylated C/All C , all output counts are 0

Question

[sam]

Code:

/X/X/X/X/bismark/Bismark-0.24.0/bismark_methylation_extractor --counts --comprehensive --multicore 8 X.bam
/X/X/X/X/bismark2bedGraph CpG_file.gz -o file.bedGraph
/X/X/X/X/coverage2cytosine--genome_folder ../X_ref file.bedGraph -o finalOut.txt

Error: