Looks like the defaults for dbsnp are not picked up for the full size tests https://cloud.seqera.io/orgs/nf-core/workspaces/AWSmegatests/watch/3T1ciPRvfRAKNi/v2/logs

Known sites are required for performing base recalibration. Supply them with either --dbsnp and/or --known_sites or disable base recalibration with --skip_baserecalibration

It seems like the full size test config isn't complete yet indeed: https://github.com/nf-core/rnavar/blob/dev/conf/test_full.config