Fix

assets/minecraft/font/default.json

···
             ]
         },
         {
+            "type": "bitmap",
+            "file": "minecraft:gui/marker/marker_0.png",
+            "ascent": 7,
+            "height": 7,
+            "chars": [
+                "\uEff4"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/marker/marker_1.png",
+            "ascent": 7,
+            "height": 7,
+            "chars": [
+                "\uEff5"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/marker/marker_2.png",
+            "ascent": 7,
+            "height": 7,
+            "chars": [
+                "\uEff6"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/marker/marker_3.png",
+            "ascent": 7,
+            "height": 7,
+            "chars": [
+                "\uEff7"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/marker/marker_4.png",
+            "ascent": 7,
+            "height": 7,
+            "chars": [
+                "\uEff8"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/marker/marker_5.png",
+            "ascent": 7,
+            "height": 7,
+            "chars": [
+                "\uEff9"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/marker/marker_6.png",
+            "ascent": 7,
+            "height": 7,
+            "chars": [
+                "\uEffa"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/marker/marker_7.png",
+            "ascent": 7,
+            "height": 7,
+            "chars": [
+                "\uEffb"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/chunk.png",
+            "ascent": 7,
+            "height": 170,
+            "chars": [
+                "\uEffc"
+            ]
+        },
+        {
+            "type": "bitmap",
+            "file": "minecraft:gui/blank.png",
+            "ascent": 7,
+            "height": 170,
+            "chars": [
+                "\uEffd"
+            ]
+        },
+        {
             "type": "ttf",
             "file": "minecraft:negative_spaces.ttf",
             "shift": [0.0, 0.0],

assets/minecraft/models/custom/gui/back.json

···
+{
+    "parent": "minecraft:item/generated",
+    "textures": {
+        "layer0": "minecraft:gui/elements/back"
+    }
+}

assets/minecraft/models/custom/gui/disabled.json

···
+{
+    "parent": "minecraft:item/generated",
+    "textures": {
+        "layer0": "minecraft:gui/elements/disabled"
+    }
+}

assets/minecraft/models/custom/gui/empty.json

···
+{
+    "parent": "minecraft:item/generated",
+    "textures": {
+        "layer0": "minecraft:gui/empty"
+    }
+}

assets/minecraft/models/custom/gui/enabled.json

···
+{
+    "parent": "minecraft:item/generated",
+    "textures": {
+        "layer0": "minecraft:gui/elements/enabled"
+    }
+}

assets/minecraft/models/custom/gui/user.json

···
+{
+    "parent": "minecraft:item/generated",
+    "textures": {
+        "layer0": "minecraft:gui/elements/user"
+    }
+}

assets/minecraft/models/custom/gui/user_add.json

···
+{
+    "parent": "minecraft:item/generated",
+    "textures": {
+        "layer0": "minecraft:gui/elements/user_add"
+    }
+}

assets/minecraft/models/item/map.json

···
 {
-    "parent": "item/generated",
+    "parent": "minecraft:item/generated",
     "textures": {
-        "layer0": "item/map",
-        "layer1": "item/map_overlay"
+      "layer0": "minecraft:item/map"
     },
     "overrides": [
         {

assets/minecraft/models/item/stick.json

···
+{
+    "parent": "item/handheld",
+    "textures": {
+        "layer0": "item/stick"
+    },
+    "overrides": [
+        {
+            "predicate": {
+                "custom_model_data": 1000
+            },
+            "model": "custom/gui/empty"
+        },
+        {
+            "predicate": {
+                "custom_model_data": 1001
+            },
+            "model": "custom/gui/user"
+        },
+        {
+            "predicate": {
+                "custom_model_data": 1002
+            },
+            "model": "custom/gui/user_add"
+        },
+        {
+            "predicate": {
+                "custom_model_data": 1003
+            },
+            "model": "custom/gui/enabled"
+        },
+        {
+            "predicate": {
+                "custom_model_data": 1004
+            },
+            "model": "custom/gui/disabled"
+        },
+        {
+            "predicate": {
+                "custom_model_data": 1005
+            },
+            "model": "custom/gui/back"
+        }
+    ]
+}