FileLoader should try harder

Loading calibrations/materials-map.cbor from https://eicweb.phy.anl.gov/EIC/detectors/athena/uploads/cff8f8d5919d8e78561e8caf2b4fad2b/material-maps.cbor
--2021-11-04 07:49:27--  https://eicweb.phy.anl.gov/EIC/detectors/athena/uploads/cff8f8d5919d8e78561e8caf2b4fad2b/material-maps.cbor
Resolving eicweb.phy.anl.gov (eicweb.phy.anl.gov)... failed: Temporary failure in name resolution.
wget: unable to resolve host address ‘eicweb.phy.anl.gov’