Hello, welcome to the forum. There are a few possible reasons why this could happen. Some of them are:
• The banners have an end date that has expired. You can check this by going to the banner settings and seeing if there is a date set for when the banners should stop showing.
• Someone has changed something on your site or hosting that affects the banner display. For example, if your hosting has updated the PHP or MySQL version, or if you or your hosting have restored a backup, this could cause the banners to disappear.
Try to go to every banner and hint save