Forbidden access

Hello, I am using SmartSearchWP version 2.7.3 on a WordPress website hosted by OVH with Divi builder theme. I have successfully configured my OpenAI API key and added API credits. The key is validated correctly by the plugin. Current status: OpenAI API key is valid OpenAI billing is active Contexts are generated successfully Pages are trained and marked as active (green status) REST API is enabled and working ( /wp-json/ loads correctly) The route /wp-json/wdgpt/v1 is registered correctly However, the chatbot does not work. When a visitor sends a message, the request: POST /wp-json/wdgpt/v1/retrieve-prompt returns: 403 Forbidden Response: <title>403 Forbidden</title> <h1>Forbidden</h1> <p>You don't have permission to access this resource.</p> Additional information: Hosting: OVH CDN: OVH Basic CDN enabled WP-Optimize cache disabled during testing Permalinks refreshed Context generation works correctly Only chatbot requests fail In Chrome DevTools, the failed request is: https://domainedesclauzes.com/wp-json/wdgpt/v1/retrieve-prompt Status code: 403 Forbidden Could you please advise what could cause the retrieve-prompt endpoint to return a 403 error while context generation works correctly? Thank you. The page I need help with: [ log in to see the link] Hello, Your request has been received. We will get back to you shortly. Thank you JC