@jennaj sorry only seeing your notification now too, the featurecounts annotation files are not a data table they're in the subread conda package (featurecounts is part of subread), they should be in the annotation dir beside the bin dir e.g.
hg19_RefSeq_exon.txt hg38_RefSeq_exon.txt mm10_RefSeq_exon.txt mm9_RefSeq_exon.txt
but this is the line in the featurecounts wrapper that adds the path to the annotation folder: https://github.com/galaxyproject/tools-iuc/blob/42cb8c709549fd2fe8882be18eaa1dffe17474f8/tools/featurecounts/featurecounts.xml#L12
could something be wrong there? as I don't see the built-in files in usegalaxy.eu either, but they work in our instance (and work well afaict)
GeneID Chr Start End Strand 497097 chr1 3204563 3207049 - 497097 chr1 3411783 3411982 - 497097 chr1 3660633 3661579 -
-------------- annotation Directory including NCBI RefSeq gene annotations for genomes 'hg19', 'hg38', 'mm10' and 'mm9'. Each row is an exon. Entrez gene identifiers and chromosomal coordinates are provided for each exon.