StoRM BackEnd fails in loading welcome.txt file at service bootstrap. This is due to an error in StoRM BackEnd configuration files folder lookup.
Follows a snippet from BackEnd log file:

11:53:49.435 [main] ERROR it.grid.storm.config.WelcomeMessage - Unable
to create the welcome message. The welcome.txt file does not exist at
path /root/etc/welcome.txt

The method used to determine configuration files folder:

public String namespaceConfigPath() {
  String storm_home = System.getProperty("user.dir");
  String configDir = storm_home + File.separator + "etc";
  return configDir;
}

Method uses property user.dir that resolves to current directory.
Have to be modified to return /etc/storm/backend-server