I don't know why you get this error, but I would troubleshoot by changing one thing at a time in your user_nl_clm. So for example I might start by confirming that a default case (no changes to user_nl_clm) has QFLX_LIQ_GRND in history. If not, then add it with the hist_fincl1 line. Then proceed with other changes one at a time.