I found a missing "n" in TeX.pool.ltxml:
index 85a9d65..4957f0c 100644
--- a/lib/LaTeXML/Package/TeX.pool.ltxml
+++ b/lib/LaTeXML/Package/TeX.pool.ltxml
@@ -4439,7 +4439,7 @@ DefConstructorI('\@math@enskip', undef,
properties => { isSpace => 1, width => sub { Dimension('0.5em'); } });
DefPrimitiveI('\@text@enskip', undef, "\x{2002}", alias => '\enskip');
-DefMacroI('\enspace', undef, '\ifmmode\@math@espace\else\@text@enspace\fi');
+DefMacroI('\enspace', undef, '\ifmmode\@math@enspace\else\@text@enspace\fi');
DefConstructorI('\@math@enspace', undef,
"<ltx:XMHint name='enskip' width='#width'/>",
alias => '\enspace',
I found a missing "n" in TeX.pool.ltxml: