There are a number of broken soft links in the Charybdis cards directory. For example, https://github.com/cms-sw/genproductions/blob/master/bin/Charybdis/cards/production/13TeV/BlackHole/BH8/CardsFor2016Analysis/BH8_CH_MD4000_MBH11000_n4/charybdis2.template points to:
/afs/cern.ch/user/b/belotel/w0/blackgen/charybdis2.template
I encountered problems trying to move a genproductions folder with xrdcp (I couldn't see a way to ask xrdcp to ignore the errors, so the xrdcp operation fails). In any case, the broken soft links should be fixed or removed, and in general, this repository probably shouldn't contain soft links to users' private directories.