--- a/teal-src/util/datamapper.tl	Tue Mar 23 21:52:07 2021 +0100
+++ b/teal-src/util/datamapper.tl	Tue Mar 23 23:55:33 2021 +0100
@@ -37,6 +37,7 @@
 end
 
 local function totype(t : json_type_name, s : string) : any
+	if not s then return nil end
 	if t == "string" then
 		return s;
 	elseif t == "boolean" then