Made changes to add_header_left.
Change the name of attr original_kable_meta to kable_meta
diff --git a/R/zzz.R b/R/zzz.R
index 848679b..2096511 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -1,4 +1,5 @@
 .onLoad <- function(libname = find.package("kableExtra"), pkgname = "kableExtra") {
   usepackage_latex("booktabs")
   usepackage_latex("longtable")
+  usepackage_latex("array")
 }