Error 500 on /api/v2/diagnostics/config_history/revisions

[robindbe]

Describe the bug
When performing a GET to this endpoint, an error is returned. Adding any of the query parameters (e.g. ?limit=1&offset=0&sort_order=SORT_DESC) makes no difference.

To Reproduce
GET https://firewall/api/v2/diagnostics/config_history/revisions

Expected behavior
A list of revisions to be returned.

Screenshots or Response

{
    "code": 500,
    "status": "internal server error",
    "response_id": "ENDPOINT_RECEIVED_UNEXPECTED_ERROR",
    "message": "Call to undefined function RESTAPI\\Models\\get_backups()\n#0 /usr/local/pkg/RESTAPI/Core/Model.inc(849): RESTAPI\\Models\\ConfigHistoryRevision->get_config_history()\n#1 /usr/local/pkg/RESTAPI/Core/Model.inc(1885): RESTAPI\\Core\\Model->get_internal_objects()\n#2 /usr/local/pkg/RESTAPI/Core/Model.inc(1949): RESTAPI\\Core\\Model::read_all()\n#3 /usr/local/pkg/RESTAPI/Core/Endpoint.inc(1129): RESTAPI\\Core\\Model::query()\n#4 /usr/local/pkg/RESTAPI/Core/Endpoint.inc(1068): RESTAPI\\Core\\Endpoint->get()\n#5 /usr/local/www/api/v2/diagnostics/config_history/revisions/index.php(9): RESTAPI\\Core\\Endpoint->process_request()\n#6 {main}",
    "data": []
}

pfSense Version & Package Version:

• pfSense Version: 25.11
• Package Version v2.7.1

Affected Endpoints:

• URL: /api/v2/diagnostics/config_history/revisions

Additional context
I also tried fetching a specific revision instead of all, but I couldn't find which numbering is used (its not the ID you see when you download the revision, since I tried that).

[jaredhendrickson13]

Looks like pfSense Plus 25.11 either removed the get_backups() function or changed its name. I'll see if I can pin down what's changed in Plus since get_backups() is still present and used in CE 2.8.1.