System Error for field repeater Set repeater

I have a field with this setting:

{
“field”: {
“name”: “ABC”,
“type”: “set”,
“options”: {
“fields”: [
{
“name”: “Cat”,
“label”: “Cat”,
“type”: “text”
},
{
“name”: “active_cat”,
“label”: “active_cat”,
“type”: “boolean”
},
{
“type”: “repeater”,
“label”: “Add”,
“options”: {
“field”: {
“name”: “name_menu”,
“type”: “set”,
“options”: {
“fields”: [
{
“name”: “Name”,
“type”: “text”,
“label”: “Name”
},
{
“name”: “Desc”,
“type”: “text”,
“label”: “Desc”
}
]
}
}
}
}
]
}
}
}

When I save, a “system error” message appears.
It works locally but on my remote server it doesn’t work. On the remote server I installed MongoDB.

Could this possibly cause the problem?
Thanks