Technical Tip: FortiManager GUI shows blank page after upgrade to v7.6.5 or v7.6.6 from prior versions

When FortiManager is upgraded to versions 7.6.5 or 7.6.6 from previous versions (for example, v7.6.2), the GUI access may be lost.

Before performing the upgrade, check if ADOM 'flags' has a negative value by using an API call:

1. Run the API call to get ADOM info and check the flag:

{
  "id": "1",

  "session": "{{session}}",

  "method": "get",
  "params": [{
    "url": "/dvmdb/adom/"   
  }]
}

Response:
The response lists all ADOMs, look for each ADOM and its 'flags' field, which does not return as a uint64 and shows a negative value:

"data": {
      "desc": "",
      "flags": -161664,
      "lock_override": 0,
      "log_db_retention_hours": 1440,
      "log_disk_quota": 1000,
      "log_disk_quota_alert_thres": 90,
      "log_disk_quota_split_ratio": 70,
      "log_file_retention_hours": 8760,
      "mode": 1,
      "mr": 6,
      "name": "root",
      "oid": 3,
      "os_ver": 7,
      "primary_dns_ip4": "0.0.0.0",
      "restricted_prds": 4503599627,
      "secondary_dns_ip4": "0.0.0.0",
      "state": 1,
      "tz": -1,
      "uuid": "6d72d904-db1a-51f0-d1c4-adba",
      "workspace_mode": 0
  },

2. Using an API call to update the flag of all required ADOMs:

{

    "method": "update",

       "session": "{{session}}",
    "params": [
        {
            "url": "dvmdb/adom/{{ADOM_NAME}}",
            "data": {
                "flags": xxxxx 
            }
        }
    ]
}

Note: To get the correct 'flags' value, it is recommended to provide the FortiManager database to the Fortinet Technical Support team for case-by-case analysis: Customer Service Tip: How to create a ticket for Fortinet TAC

Related documents:

Technical Tip: Using FortiManager API

Fortinet Development Network (FNDN) - FortiManager