@imagely – The weirdest thing happened: I went in, just to double check, and reactivated each plugin one by one and tested. All 4 are now working. So odd! I didn’t do anything from yesterday. Thanks for all of your help!
@imagely Thanks for the response!
Here’s what I found when I deactivated all plugins, cleared cache, and reactivated NextGen. The following plugins caused the pages not to work as specified previously:
– Advanced Custom Field v4.4.11
– Fast Secure Contact Form v4.0.52
– Tubepress v3.1.8 (it doesn’t look like it’s compatible with 4.8, so I’m going to find something to replace it)
– WP RSS Aggregator v4.11.1 (also doesn’t appear to be compatible with 4.8)
With these four deactivated, I’m now able to edit certain aspects of the site correctly. Any suggestions?