Shopify requires cookies to log in to embedded apps, like ours, and it is the only method supported by Shopify for the embedded apps to work within the Shopify admin.
By default, the Brave browser will block third-party cookies. So, to make embedded apps work while using this browser, you would need to adjust your cookie settings.
When you log in to your Shopify admin, click the Shield in the top right corner and set the cookies to "All Cookies allowed".
That will ensure our apps can be displayed and loaded correctly in your Shopify Admin.
Note: Shopify requires an up-to-date web browser to ensure you can use all of Shopify's features. Also, the Brave browser is not on Shopify's list of supported browsers, as you can see in this post: https://help.shopify.com/en/manual/shopify-admin/supported-browsers. Therefore, support for it is still not 100%.