Fix.

node_modules/har-schema/lib/page.json

@@ -0,0 +1,32 @@
+{
+  "$id": "page.json#",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "type": "object",
+  "optional": true,
+  "required": [
+    "startedDateTime",
+    "id",
+    "title",
+    "pageTimings"
+  ],
+  "properties": {
+    "startedDateTime": {
+      "type": "string",
+      "format": "date-time",
+      "pattern": "^(\\d{4})(-)?(\\d\\d)(-)?(\\d\\d)(T)?(\\d\\d)(:)?(\\d\\d)(:)?(\\d\\d)(\\.\\d+)?(Z|([+-])(\\d\\d)(:)?(\\d\\d))"
+    },
+    "id": {
+      "type": "string",
+      "unique": true
+    },
+    "title": {
+      "type": "string"
+    },
+    "pageTimings": {
+      "$ref": "pageTimings.json#"
+    },
+    "comment": {
+      "type": "string"
+    }
+  }
+}