[Bug]: POST /api/v1/rest/attributes/{code}/options throws TypeError: setLabels() Argument #1 must be of type array, string given

Pre-submission checklist

• I have searched the existing issues and this bug has not already been reported.

UnoPim Version(s) affected

2.1.6

Issue Description

When creating a new attribute option via the REST API, the request fails with a 500 Internal Server Error.

Preconditions (environment)

self-hosted Docker deployment, UnoPim (latest as of July 2026), Laravel 12.

Steps to reproduce

Authenticate via POST /oauth/token (password grant) — succeeds, returns valid token Confirm existing options via GET /api/v1/rest/attributes/brand/options — succeeds, returns e.g.:

json [{"code": "kazoo", "sort_order": 1, "labels": {"en_AU": "Kazoo"}}]

Attempt to create a new option via POST /api/v1/rest/attributes/brand/options with body:

json {"code": "bainbridge", "labels": {"en_AU": "Bainbridge"}}

Receive 500 Internal Server Error

Expected Result

the option is created, matching the shape returned by the GET endpoint.

Actual Result

Webkul\AdminApi\Http\Controllers\API\ApiController::setLabels(): Argument #1 ($requestData) must be of type array, string given, called in /var/www/html/packages/Webkul/AdminApi/src/Http/Controllers/API/Catalog/AttributeController.php on line 178

Screenshots

No response

Additional Context

No response