Splicemachine ERROR 08006 insufficient data

Question

I've just managed to install Splicemachine on Centos and I try to run one of their demos (https://doc.splicemachine.com/onprem_install_demodata.html). But when running the loadsql.sql I have encountered this problem:

call SYSCS_UTIL.IMPORT_DATA('SPLICE' , 'T_HEADER'  , null , '/vagrant/splicemachine/demodata/data/theader.csv'   , ',' , null , null , 'yyyy-MM-dd' , null , 0 , null , null , null);
ERROR 08006: Insufficient data while reading from the network - expected a minimum of 6 bytes and received only 0 bytes.  The connection has been terminated.

I'm running this on the standalone community version. What could be the issue?

Regards

EDIT: New error today running the same script:

ERROR 08006: A network protocol error was encountered and the connection has been terminated: the requested command encountered an unarchitected and implementation-specific condition for which there was no architected message (additional information may be available in the derby.log file on the server)
ERROR 08006: DERBY SQL error: SQLCODE: -1, SQLSTATE: 08006, SQLERRMC: A communications error has been detected: {0}.::SQLSTATE: XJ001Java exception: 'Yarn application has already ended! It might have been killed or unable to launch application master.: org.apache.spark.SparkException'.

Splice.log

07:33:53,246 (RS:0;localhost:33863) WARN  [c.s.d.l.ManagerLoader] - No Manager implementation found.
07:48:49,850 (olap-worker-0) WARN  [c.s.d.i.SpliceSpark] - ##############################################################################
07:48:49,854 (olap-worker-0) WARN  [c.s.d.i.SpliceSpark] -     Initializing Spark with: master = yarn-client
07:48:49,854 (olap-worker-0) WARN  [c.s.d.i.SpliceSpark] - ##############################################################################
07:48:59,524 (olap-worker-0) WARN  [c.s.d.i.SpliceSpark] - Trying to get local hostname. This could be problem for host with multiple interfaces.
07:48:59,541 (olap-worker-0) WARN  [c.s.d.i.SpliceSpark] - For machine with multiple interfaces, please set hbase.master.hostname.

07:37:05,793 (pool-13-thread-1) ERROR [c.s.p.SnappyPipelineCompressor] - No Native Snappy Installed: Splice Machine's Write Pipeline will not compress data over the wire.
07:51:17,005 (olap-worker-0) ERROR [o.a.s.SparkContext] - Error initializing SparkContext.
07:51:19,803 (olap-worker-0) ERROR [o.a.s.u.Utils] - Uncaught exception in thread olap-worker-0
07:51:19,900 (olap-worker-0) ERROR [c.s.o.OlapRequestHandler] - Uncaught exception
07:51:21,662 (olapClientWorker-1) ERROR [c.s.s.StreamListener] - StreamListener failed

yarn.log

PM com.google.inject.servlet.GuiceFilter setPipeline
WARNING: Multiple Servlet injectors detected. This is a warning indicating that you have more than one GuiceFilter running in your web application. If this is deliberate, you may safely ignore this message. If this is NOT deliberate however, your application may not work as expected.