Index: lams_central/src/java/org/lamsfoundation/lams/web/LoginRequestServlet.java
===================================================================
diff -u -reb06cf9300f02897c13bd577689deacb2cf4b5fc -r9ba6bf0c302b06f8f8f7be51667054e680ad1e52
--- lams_central/src/java/org/lamsfoundation/lams/web/LoginRequestServlet.java	(.../LoginRequestServlet.java)	(revision eb06cf9300f02897c13bd577689deacb2cf4b5fc)
+++ lams_central/src/java/org/lamsfoundation/lams/web/LoginRequestServlet.java	(.../LoginRequestServlet.java)	(revision 9ba6bf0c302b06f8f8f7be51667054e680ad1e52)
@@ -111,7 +111,7 @@
 	    }
 	}
 
-	String[] localeParts = langIsoCode.split("_");
+	String[] localeParts = langIsoCode == null ? new String[0] : langIsoCode.split("_");
 	// if langIsoCode is just 2 letters, then countryIsoCode stays the same and country will fall back to default
 	// if langIsoCode is en_AU, then it gets split to langIsoCode and countryIsoCode
 	// and the old value of countryIsoCode is considered country