Don't show stacktrace for region comparison when there's no regulation data for a species.
Don't show stacktrace for region comparison when there's no regulation data
for a species.

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode