diff --git a/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_mgr.java b/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_mgr.java
index b57658150..29382851f 100644
--- a/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_mgr.java
+++ b/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_mgr.java
@@ -33,6 +33,7 @@ import gplx.core.threads.*; import gplx.core.net.*; import gplx.core.primitives.
 import gplx.langs.jsons.*; import gplx.langs.htmls.encoders.*;
 import gplx.xowa.wikis.pages.*;
 import gplx.xowa.addons.wikis.searchs.gui.htmlbars.*;
+import gplx.xowa.specials.*; import gplx.xowa.specials.xowa.errors.*;
 public class Http_server_mgr implements Gfo_invk {
 	private final    Object thread_lock = new Object();
 	private final    Gfo_usr_dlg usr_dlg;
@@ -116,7 +117,13 @@ public class Http_server_mgr implements Gfo_invk {
 				} finally {tmp_bfr.Mkr_rls();}
 			}
 			Xoa_url url = wiki.Utl__url_parser().Parse(ttl_bry);
-			Xoa_ttl ttl = Xoa_ttl.Parse(wiki, url.To_bry_page_w_anch()); // changed from ttl_bry to page_w_anch; DATE:2017-07-24
+			Xoa_ttl ttl = wiki.Ttl_parse(url.To_bry_page_w_anch()); // changed from ttl_bry to page_w_anch; DATE:2017-07-24
+
+			// handle invalid titles like "Earth]"; ISSUE#:480; DATE:2019-06-02
+			if (ttl == null) {
+				ttl = wiki.Ttl_parse(Xow_special_meta_.Itm__error.Ttl_bry());
+				url = wiki.Utl__url_parser().Parse(Xoerror_special.Make_url__invalidTitle(ttl_bry));
+			}
 
 			// get the page
 			gplx.xowa.guis.views.Xog_tab_itm tab = Gxw_html_server.Assert_tab2(app, wiki);	// HACK: assert tab exists
diff --git a/400_xowa/src/gplx/xowa/specials/Xow_special_meta_.java b/400_xowa/src/gplx/xowa/specials/Xow_special_meta_.java
index 5821cd85b..d9de28d76 100644
--- a/400_xowa/src/gplx/xowa/specials/Xow_special_meta_.java
+++ b/400_xowa/src/gplx/xowa/specials/Xow_special_meta_.java
@@ -32,6 +32,7 @@ public class Xow_special_meta_ {
 	, Ttl__page_history			= "XowaHistory"
 	, Ttl__bookmarks			= "XowaBookmarks"
 	, Ttl__diag					= "XowaDiag"
+	, Ttl__error				= "XowaError"
 	;
 	public static final    Xow_special_meta
 	  Itm__all_pages			= new Xow_special_meta(Src__mw		, Ttl__all_pages)
@@ -49,5 +50,6 @@ public class Xow_special_meta_ {
 	, Itm__page_history			= new Xow_special_meta(Src__xowa	, Ttl__page_history)
 	, Itm__bookmarks			= new Xow_special_meta(Src__xowa	, Ttl__bookmarks)
 	, Itm__diag					= new Xow_special_meta(Src__xowa	, Ttl__diag)
+	, Itm__error                = new Xow_special_meta(Src__xowa    , Ttl__error)
 	;
 }
diff --git a/400_xowa/src/gplx/xowa/specials/Xow_special_mgr.java b/400_xowa/src/gplx/xowa/specials/Xow_special_mgr.java
index ff64394b5..8e8be88b8 100644
--- a/400_xowa/src/gplx/xowa/specials/Xow_special_mgr.java
+++ b/400_xowa/src/gplx/xowa/specials/Xow_special_mgr.java
@@ -18,7 +18,7 @@ import gplx.xowa.users.history.*;
 import gplx.xowa.langs.*; import gplx.xowa.langs.specials.*;
 import gplx.xowa.specials.*;
 import gplx.xowa.specials.allPages.*; import gplx.xowa.specials.nearby.*; import gplx.xowa.specials.statistics.*; import gplx.xowa.xtns.translates.*; import gplx.xowa.specials.movePage.*;
-import gplx.xowa.specials.xowa.system_data.*; import gplx.xowa.specials.xowa.default_tab.*; import gplx.xowa.specials.xowa.popup_history.*; import gplx.xowa.addons.wikis.imports.*; import gplx.xowa.specials.xowa.diags.*; import gplx.xowa.xtns.wbases.mediawiki.repo.includes.specials.*;
+import gplx.xowa.specials.xowa.system_data.*; import gplx.xowa.specials.xowa.default_tab.*; import gplx.xowa.specials.xowa.popup_history.*; import gplx.xowa.addons.wikis.imports.*; import gplx.xowa.specials.xowa.diags.*; import gplx.xowa.xtns.wbases.mediawiki.repo.includes.specials.*; import gplx.xowa.specials.xowa.errors.*;
 import gplx.xowa.xtns.wbases.specials.*;
 import gplx.xowa.users.data.*; import gplx.xowa.users.bmks.*;
 import gplx.xowa.specials.mgrs.*; import gplx.xowa.addons.wikis.searchs.specials.*;
@@ -47,6 +47,7 @@ public class Xow_special_mgr {
 	public Popup_history_page			Page_popup_history() {return page_popup_history;} private final    Popup_history_page page_popup_history = new Popup_history_page();
 	public Xows_bmk_page				Page_bmk() {return page_bmk;} private final    Xows_bmk_page page_bmk = new Xows_bmk_page();
 	public Xows_diag_page				Page_diag() {return page_diag;} private final    Xows_diag_page page_diag = new Xows_diag_page();
+	public Xoerror_special				Page_error() {return page_error;} private final    Xoerror_special page_error = new Xoerror_special();
 	public void Evt_lang_changed(Xol_lang_itm lang) {
 		// add special pages by old manual method; DEPRECATED
 		hash.Clear();
@@ -66,6 +67,7 @@ public class Xow_special_mgr {
 		hash.Add_str_obj(Xow_special_meta_.Ttl__popup_history			, page_popup_history);
 		hash.Add_str_obj(Xow_special_meta_.Ttl__bookmarks				, page_bmk);
 		hash.Add_str_obj(Xow_special_meta_.Ttl__diag					, page_diag);
+		hash.Add_str_obj(Xow_special_meta_.Ttl__error					, page_error);
 
 		// add app's Special_regy to hash table; needed for case insensitivity by wiki's lang; EX: Special:rANDom; NOTE: needs to go before lang aliases
 		Xoa_special_regy special_regy = app.Special_regy();
diff --git a/400_xowa/src/gplx/xowa/specials/xowa/errors/Xoerror_special.java b/400_xowa/src/gplx/xowa/specials/xowa/errors/Xoerror_special.java
new file mode 100644
index 000000000..6b004e915
--- /dev/null
+++ b/400_xowa/src/gplx/xowa/specials/xowa/errors/Xoerror_special.java
@@ -0,0 +1,47 @@
+/*
+XOWA: the XOWA Offline Wiki Application
+Copyright (C) 2012-2017 gnosygnu@gmail.com
+
+XOWA is licensed under the terms of the General Public License (GPL) Version 3,
+or alternatively under the terms of the Apache License Version 2.0.
+
+You may use XOWA according to either of these licenses as is most appropriate
+for your project on a case-by-case basis.
+
+The terms of each license can be found in the source code repository:
+
+GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
+Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
+*/
+package gplx.xowa.specials.xowa.errors; import gplx.*; import gplx.xowa.*; import gplx.xowa.specials.*; import gplx.xowa.specials.xowa.*;
+import gplx.core.primitives.*; import gplx.core.brys.fmtrs.*; import gplx.core.net.*; import gplx.core.net.qargs.*;
+import gplx.xowa.langs.*;
+import gplx.xowa.apps.urls.*;
+public class Xoerror_special implements Xow_special_page {
+	public Xow_special_meta Special__meta() {return Xow_special_meta_.Itm__error;}
+	public void Special__gen(Xow_wiki wikii, Xoa_page pagei, Xoa_url url, Xoa_ttl ttl) {
+		Xoae_page page = (Xoae_page)pagei;
+		Gfo_qarg_mgr qarg_mgr = new Gfo_qarg_mgr();
+		qarg_mgr.Init(url.Qargs_ary());
+		String type = qarg_mgr.Read_str_or("type", "unknown type");
+		String data = qarg_mgr.Read_str_or("data", "unknown data");
+		String title = type;
+		String msg = data;
+		if (String_.Eq(type, "InvalidTitle")) {
+			title = "Invalid title";
+			msg = "The title has invalid characters: <span style='color:red;font-weight:bold'>" + data + "</span>";
+		}
+
+		page.Db().Text().Text_bry_(fmt.Bld_many_to_bry(Bry_bfr_.New(), title, msg));
+	}
+	private static final    Bry_fmt fmt = Bry_fmt.Auto(String_.Concat_lines_nl_skip_last
+	( "<h2>~{title}</h2>"
+	, "<p>~{msg}"
+	, "</p>"
+	));
+
+	public Xow_special_page Special__clone() {return this;}
+	public static byte[] Make_url__invalidTitle(byte[] invalid_title) {
+		return Bry_.Add(Xow_special_meta_.Itm__error.Ttl_bry(), Bry_.new_a7("?type=InvalidTitle&data="), invalid_title);
+	}
+}