If a pop-up like the one shown below appears when logging in to Omnichannel, it is caused by an update related to Modern Mode.
To learn more about the differences between Modern Mode and Legacy Mode, you can refer to the following article:

In Legacy Mode, authentication and role assignments are inherited from POS.

In the Modern Mode, authentication and role assignments are managed directly from omni.dealpos.app.

This allows administrators to control user access and permissions within Omni itself, without depending on POS settings.

Currently, all users are still using Legacy Mode, but we are transitioning customers to Modern Mode so that user management can be handled entirely from Omni.

You have to switch to Modern Mode after you have invited or migrated users in Omni.

Below is an image showing how to switch from Legacy Mode to Modern Mode through the Channel menu.

DealPOS is an online point-of-sale (POS) application specifically designed for retail businesses in categories like Fashion, Minimarkets, Electronics, Fresh Food, and Building Material Stores.

With DealPOS, you can manage both online and offline store inventory in real-time on a single platform. You can also sell through omnichannel (offline and online) as DealPOS integrates with marketplaces (Shopee, Tokopedia, TikTok Shop, Lazada) and instant web stores (Shopify and WooCommerce).