perl vcf2maf.pl --input-vcf tests/test.vcf --output-maf tests/test.vep.maf --ref-fasta $ref
[W::fai_get_val] Reference 13:28608241-28608243 not found in FASTA file, returning empty sequence
[W::fai_get_val] Reference 13:28608241-28608243 not found in FASTA file, returning empty sequence
[faidx] Failed to fetch sequence in 13:28608241-28608243
ERROR: You're either using an outdated samtools, or --ref-fasta is not the same genome build as your --input-vcf. at vcf2maf.pl line 433.