[Theme Horse Support Team]

Hi
I think you didnot uploaded the recommened size for the banner. You can view at our theme instruction page to upload the size of image for full width.

https://www.themehorse.com/theme-instruction/attitude-pro/

13) Recommended Image Sizes – top

This theme depends heavily on Featured Images per post. Read more about Featured Images.

a. Slider Image size for Wide Layout

Width: 1400px
Height: 460px

b. Slider Image size for Narrow Layout

Width: 1038px
Height: 460px

c. Featured Image per post for Blog Image Medium Template

Width: 230px
Height: 230px

d. Featured Image per post for Blog Image Large Template

Width: 670px
Height: 300px

e. Image size for icon used in Business Layout

Width: 80px
Height: 80px