Can't create sumologic_content resource using file function

[uridium]

When I'm trying to create a content using file() function, I'm getting an error:

$ terraform apply -auto-approve
sumologic_folder.this: Refreshing state... [id=0000000001230571]
sumologic_content.this: Creating...

Error: {"id":"RADAY-7WDCD-QJ601","errors":[{"code":"service.argument.invalid","message":"The request body you've provided is invalid. Could not resolve type 'null' as a subtype of 'ContentSyncDefinition'"}]}

  on main.tf line 9, in resource "sumologic_content" "this":
   9: resource "sumologic_content" "this" {

$ cat main.tf
data "sumologic_personal_folder" "this" {}

resource "sumologic_folder" "this" {
  parent_id   = data.sumologic_personal_folder.this.id
  name        = "JenkinsErrors"
  description = "Jenkins build errors"
}

resource "sumologic_content" "this" {
    parent_id = sumologic_folder.this.id
    config = jsonencode(file("${path.module}/data.json"))
}

$ cat data.json
{
    "type": "SavedSearchWithScheduleSyncDefinition",
    "name": "some-query",
    "search": {
        "queryText": "\"some query\"",
        "defaultTimeRange": "-15m",
        "byReceiptTime": false,
        "viewName": "",
        "viewStartTime": "1970-01-01T00:00:00Z",
        "queryParameters": [],
        "parsingMode": "Manual"
    },
    "searchSchedule": {
        "cronExpression": "17 * * * * ? *",
        "displayableTimeRange": "-5m",
        "parseableTimeRange": {
            "type": "BeginBoundedTimeRange",
            "from": {
                "type": "RelativeTimeRangeBoundary",
                "relativeTime": "-5m"
            },
            "to": null
        },
        "timeZone": "Etc/UTC",
        "threshold": {
            "thresholdType": "group",
            "operator": "gt",
            "count": 0
        },
        "notification": {
            "taskType": "WebhookSearchNotificationSyncDefinition",
            "webhookId": "0000000000015290",
            "payload": null,
            "itemizeAlerts": true,
            "maxItemizedAlerts": 50
        },
        "scheduleType": "RealTime",
        "muteErrorEmails": false,
        "parameters": []
    },
    "description": ""
}

But when I keep the entire json in main.tf file, everything works fine:

$ terraform apply -auto-approve
sumologic_folder.this: Refreshing state... [id=0000000001230571]
sumologic_content.this: Creating...
sumologic_content.this: Creation complete after 4s [id=0000000001226A9B]

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

data "sumologic_personal_folder" "this" {}

resource "sumologic_folder" "this" {
  parent_id   = data.sumologic_personal_folder.this.id
  name        = "JenkinsErrors"
  description = "Jenkins build errors"
}

resource "sumologic_content" "this" {
    parent_id = sumologic_folder.this.id
    config = jsonencode(
    {
        "type": "SavedSearchWithScheduleSyncDefinition",
        "name": "some-query",
        "search": {
            "queryText": "\"some query\"",
            "defaultTimeRange": "-15m",
            "byReceiptTime": false,
            "viewName": "",
            "viewStartTime": "1970-01-01T00:00:00Z",
            "queryParameters": [],
            "parsingMode": "Manual"
        },
        "searchSchedule": {
            "cronExpression": "17 * * * * ? *",
            "displayableTimeRange": "-5m",
            "parseableTimeRange": {
                "type": "BeginBoundedTimeRange",
                "from": {
                    "type": "RelativeTimeRangeBoundary",
                    "relativeTime": "-5m"
                },
                "to": null
            },
            "timeZone": "Etc/UTC",
            "threshold": {
                "thresholdType": "group",
                "operator": "gt",
                "count": 0
            },
            "notification": {
                "taskType": "WebhookSearchNotificationSyncDefinition",
                "webhookId": "0000000000015292",
                "payload": null,
                "itemizeAlerts": true,
                "maxItemizedAlerts": 50
            },
            "scheduleType": "RealTime",
            "muteErrorEmails": false,
            "parameters": []
        },
        "description": ""
    }
    )
}

terraform 0.14.2
sumologic 2.6.0

[mccartney]

Why would you use jsencode with file?
Isn't just file() enough?