Manage attributes link not there. Not working

This sounds like a core issue: 🐛 New contextual links are not available after a module is installed Needs work .

Can you try 1) opening a new browser window or 2) logging out and logging back in?

This is working as a result is applying this patch (#30) https://www.drupal.org/project/drupal/issues/3053906 🐛 PHP notice "Undefined index: region" on layout overrides when using the Field Layout module Needs work

@jive01 - The referenced patch addresses PHP notices. Can you explain how it's related to this issue?

Same issue here. I opened another browser and it was working well, so I had to clear some browser data (chrome) and then it was working so good.
Thanks Chris

@pgrandeg - Thanks for confirming. This is a core bug.

Duplicate of #3193067: Manage attributes link not displaying for existing blocks → , which is caused by core bug 🐛 New contextual links are not available after a module is installed Needs work .