I got an email from Syed of WPBeginner about an API issue that will break some Facebook and Instagram embeds.
" Facebook recently announced that all oEmbed requests for Facebook and Instagram content will be deprecated on October 24th, 2020.
This API is fundamental to both Gutenberg and the WordPress Classic editor’s default embed feature that lets you easily embed videos, pictures, updates, and other content from Facebook and Instagram.
Instead, Facebook now requires each developer to register an app, and use a client token when getting data from their Graph API for oEmbed content.
This is not scalable for WordPress core team to implement in the WordPress project, so a decision has been made to remove Facebook and Instagram embed feature from WordPress core in favor of letting WordPress plugins solve the issue for users (core ticket #50861)."
Here’s where you can go to find out how to fix this issue.