throw validation error if sliver has no creator
throw validation error if sliver has no creator

xmaruto/mcord,jermowery/xos,cboling/xos,jermowery/xos,xmaruto/mcord,cboling/xos,cboling/xos,cboling/xos,cboling/xos,xmaruto/mcord,xmaruto/mcord,jermowery/xos,jermowery/xos