How to correct event site background

Go to Setup

Feature Settings

Digital Experiences

All Sites

On the National Events click on Builder -> This will open the Builder of the community.

On the community builder you need to select LT Event

Once you select it you need to go to click on Theme -> Click on the top right left of the arrow

Select edit css

Add this to the popup-

.widgets-events.pfm-event-page-body.LTEEventPage{
background-color: #FFFFFF !important;
}