Problem loading Lanelet2 LineString primitives

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I tried loading this in TierIV's map builder and it loaded:

<?xml version="1.0"?>
<osm version="0.6" generator="lanelet2">
    <node id="1000" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-1.835830" />
        <tag k="local_x" v="124.835179" />
        <tag k="local_y" v="-18.654323" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1001" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-4.471690" />
        <tag k="local_x" v="208.565485" />
        <tag k="local_y" v="12.356901" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1002" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-4.530630" />
        <tag k="local_x" v="208.910054" />
        <tag k="local_y" v="12.802815" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1003" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-4.516390" />
        <tag k="local_x" v="209.416773" />
        <tag k="local_y" v="13.552759" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1004" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-4.533100" />
        <tag k="local_x" v="209.903224" />
        <tag k="local_y" v="14.444585" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1005" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-4.603040" />
        <tag k="local_x" v="210.551824" />
        <tag k="local_y" v="15.903937" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1006" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-4.609260" />
        <tag k="local_x" v="210.774781" />
        <tag k="local_y" v="16.430925" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1007" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-1.655630" />
        <tag k="local_x" v="126.760712" />
        <tag k="local_y" v="-24.714686" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1008" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-1.816720" />
        <tag k="local_x" v="131.665756" />
        <tag k="local_y" v="-22.890497" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1009" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-1.981610" />
        <tag k="local_x" v="132.253550" />
        <tag k="local_y" v="-19.992062" />
        <tag k="Curb" v="" />
        <tag k="Curb:Height" v="0.14999999999999999" />
    </node>
    <node id="1010" visible="true" version="1" lat="" lon="">
        <tag k="ele" v="-4 ...