Hi Engineer Ted,
Thank you for participating in the Apple Support Communities. We understand you're unable to copy and share photos with a link from the iCloud website. You'll want to make sure you're following these steps: Share photos and videos with an iCloud Link on iCloud.com - Apple Support.
"You can share photos and videos in Photos on iCloud.com with an iCloud Link (not available in all countries or regions). Anyone with the link can view them.
Note: You can share photos and videos in your Personal Library. To share an item in an iCloud Shared Photo Library, use the Photos app on a device with iOS 16.1, iPadOS 16, macOS Ventura, or later.
Share photos and videos with an iCloud Link
- In Photos on iCloud.com, select the photos or videos you want to share.
- Click , then do one of the following:
- Choose Email, then click Open Mail. A new email window opens with a link to your photo collection.
- Choose Copy Link, then click Copy Link. Share the link with friends. For example, you can paste it into a Messages conversation."
If that's not working, you may want to test to see if the issue occurs in another web browser which can help isolate the issue.
This article has some additional methods for using Shared Albums in Photos which you may find helpful: How to use Shared Albums in Photos on your iPhone, iPad, and Mac - Apple Support.
We hope this helps.
Take care.