On most themes, to ensure third-party apps work properly with UpCart, you’ll need to enable the following setting:

Cart Editor > Settings > Advanced Settings > Enhanced Ajax API Compatibility

This setting improves compatibility with apps like Globo Product Options and Variant, which often replace the default "Add to Cart" button with a custom function. Without this setting enabled, clicking the button may redirect customers to the store’s default cart page instead of triggering UpCart.

Additionally, in Globo’s settings, make sure to disable the option labeled:
​“Redirect to the shopping cart page after adding a product.”