Klaviyo Email Requiring 'Display Image' in Email to Customers

Hello,
We have this popup from customers where the images aren’t showing. Unsure how to fix it. Is there anything I’m missing or is this a security feature on Gmail?

Hello,
We have this popup from customers where the images aren’t showing. Unsure how to fix it. Is there anything I’m missing or is this a security feature on Gmail?
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.