Settings page - cpts are visible for one second then dissapear

They are visible with the correct content inside for one second when opening the settings page.
If i click save, they appear for one second again and dissapear again.
It worked before.

I tried disabling other plugins to rule out conflicts.

METABOX 5.11.4 and AIO 3.6.1

Warning: Undefined array key "fields" in /customers/5/b/d/hallebyggvaror.se/httpd.www/wp-content/plugins/meta-box-aio/vendor/wpmetabox/mbb-parser/src/Unparsers/MetaBox.php on line 488

{
    "$schema": "https://schemas.metabox.io/settings-page.json",
    "capability": "e6

{
    "$schema": "https://schemas.metabox.io/field-group.json",
    "fields": [
        {
            "type": "time",
            "id": "mandag_fran",
            "name": "Måndag till fredag (från)",
            "columns": 2
        },
        {
            "type": "time",
            "id": "mandag_till_fredag_till",
            "name": "Måndag till fredag (till) ",
            "columns": 2
        },
        {
            "type": "divider",
            "id": "divider_pwbhs5iw4y",
            "name": "Divider"
        },
        {
            "type": "time",
            "id": "lordag_fran",
            "name": "Lördag (från)",
            "columns": 2
        },
        {
            "type": "time",
            "id": "lordag_till",
            "name": "Lördag (till)",
            "columns": 2
        }
    ],
    "id": "oppettiderna",
    "modified": 1774892783,
    "settings_pages": [
        "oppettider"
    ],
    "show": {
        "input_value": []
    },
    "style": "default",
    "title": "Öppettiderna"
}