diff --git a/src/routes/(app)/manga/[MangaID]/(manga)/chaptersSide.svelte b/src/routes/(app)/manga/[MangaID]/(manga)/chaptersSide.svelte
index b34f0f9..3461e11 100644
--- a/src/routes/(app)/manga/[MangaID]/(manga)/chaptersSide.svelte
+++ b/src/routes/(app)/manga/[MangaID]/(manga)/chaptersSide.svelte
@@ -235,9 +235,9 @@
 		});
 	}
 
-	$: chapterNumbers = sortedChapters?.map((e) => e.chapterNumber);
+	$: chapterNumbers = sortedChapters?.map((e) => e.chapterNumber) ?? [];
 	$: checkArray = Array.from(
-		Array(Math.floor(chapterNumbers?.reduce((a, c) => Math.max(a, c)) ?? 0)),
+		Array(Math.floor(chapterNumbers.reduce((a, c) => Math.max(a, c), 0))),
 		(_, index) => index + 1
 	);
 	$: missingChapters = checkArray?.filter(
diff --git a/versionToServerVersionMapping.json b/versionToServerVersionMapping.json
index 65bf7f9..307ef73 100644
--- a/versionToServerVersionMapping.json
+++ b/versionToServerVersionMapping.json
@@ -5,7 +5,7 @@
 	},
 	{
 		"tag": "v1.1.0",
-		"uiVersion": "r1098",
+		"uiVersion": "r1101",
 		"serverVersion": "r1502",
 		"comment": "the server version is between 1.0.0 and 1.1.0 release",
 		"comment2": "because its the preview version that implemented the breaking changes"