Rails API: Devise/Warden intercepts API requests causing "No Failure App provided" error

I’m working on a Rails 8 API application where I have separated API routes from my admin panel:

namespace :api do get 'test', to: 'clerk_test#index' end devise_for :admin_users, ActiveAdmin::Devise.config ActiveAdmin.routes(self)

I’m using Clerk JWT for API authentication, and my Contoller looks like this:

class Api::ClerkTestController < Api::BaseController include Clerk::Authenticatable before_action :index def index Rails.logger.info "ClerkTest#index called for user_id=#{clerk&.user_id}" render json: { message: "Clerk test successful", user_id: clerk.user_id } end end

The issue:

When I hit /api/test with random text in the Authorization header, it works as expected. When I hit /api/test with a valid JWT, I get the following error:

RuntimeError (No Failure App provided)

I think Warden/Devise is intercepting the request before it could reach the controller. How do I stop Warden/Devise to stop intercepting? I am using ActiveAdmin for admin authentications. I have tried with skip_before_action :authenticate_admin_user! if defined?(authenticate_admin_user!). But in vain.