Good evening Jennifer and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about missing pre-html content on the venue and organizer page.
We will gladly try to assist you on this topic.
After careful inspection of the page, it seem that somehow the CSS rules are not kicking in fort the #background-layer–2 element on these pages.
I would try putting that CSS reule in your WordPress template’s CSS instead of defining it in the pre-html window found in Events -> Display.
As a first troulbeshooting step, could you please provide us with your system information in a private reply ?
Let me know if that helps.
Have a great week-end!
Geoff B.