Christine, this is what fixed it for me.
1. Disable Custom Sidebars plugin
2. install and activate Simple Page Sidebars plugin
3. Go to Settings -> Reading and pick the default sidebar.
4. Go to a page, create a new sidebar (you may be able to skip this step)
5. Disable Simple Page Sidebars
6. Enable Custom Sidebars
Thread Starter
m4k0r
(@m4k0r)
Thank you for your reply. I have done all those things and the page still does not load correctly.