code: public String enable(String spaceKey) throws GreenPepperServerException {
          try {
              if (!isServerReady()) {
                  return getText(SERVER_NOCONFIGURATION);
              }
  
              /* BEGIN : COMMENT THIS FOR DEPLOYING TO GPS */
              if (isCommercialLicense()) {
                  final User activeUser = getRemoteUser();
  
                  if (activeUser == null) {
                      return getText(ANONYMOUS_ACCESS_DENIED);
                  }
  
                  if (!getGreenPepperUserGroup().hasMembership(activeUser)) {
                      return getText(USER_NOTMEMBEROF_GREENPEPPERUSERS_GROUP);
                  }
              }
              /* END : COMMENT THIS FOR DEPLOYING TO GPS */
  
              Repository repository = getHomeRepository(spaceKey);
              getGPServerService().getRegisteredRepository(repository);
              return null;
          } catch (GreenPepperServerException e) {
              log.info(e.getMessage());
              return getText(e.getId());
          }
      }
docs: Returns a message if an exception occures.
  <p/>
  
  @param spaceKey
  Space Key
  @return a message if an exception occures.
  @throws com.greenpepper.server.GreenPepperServerException if any.