It is highly recommended that you enable Email Collection Bar's app embed on your Shopify Online Store 2.0 theme.
Why it is recommended?
The bar will load much faster.
How to do it?
1. Go to theme customization page.
2. Select theme embed.
3. Enable ECB Core Snippet and click "Save" button
In ECB app, you can find link to get to Embed App Page directly, you only need to check and make sure ECB Core Snippet is enabled and click "Save".