Wordpress-seo: AMP Issue - "The attribute 'value' may not appear in tag 'meta'."

[kasey-posterity]

• [X ] I've read and understood the contribution guidelines.
• [X ] I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened.

With the new rollout update today, our AMP pages are no longer validating.

These lines are being returned in AMP pages (we're using Amp4WP)
<meta name="twitter:label1" value="Written by"> <meta name="twitter:data1" value="AUTHOR"> <meta name="twitter:label2" value="Est. reading time"> <meta name="twitter:data2" value="1 minute">

Please describe what you expected to happen and why.

How can we reproduce this behavior?

1. Use AMP4WP

Technical info

• WordPress version:5.5.1
• Yoast SEO version: 15.2
  
• If relevant, which editor is affected (or editors):
• [x] Classic Editor
• [ ] Gutenberg
• [ ] Classic Editor plugin

* Which browser is affected (or browsers):
- [ ] IE11
- [ ] Edge
- [ X] Chrome
- [ ] Firefox
- [ ] Safari

• Relevant plugins in case of a bug:
  
• Tested with theme:

[Zabi09]

Temporarily fix is to disable the ‘Enhanced Slack sharing’ feature in SEO>General>Features.

[dariaknl]

Hello @kasey-posterity! Can you please explain what do you mean by

our AMP pages are no longer validating.

these new tags which you see are coming from new feature Enhanced Slack sharing which was released in 15.2.

[MuhammedSwalihct]

I am also experiencing the same issue with the AMP plugin.

[dariaknl]

We have accepted this bug, and it has been already added to our queue.

[dariaknl]

The fix will be released within the next version.

[AndrewMLeonard]

Disabling the ‘Enhanced Slack sharing’ feature in SEO>General>Features solved the problem for me
I don't know if I had to but I also updated the story in the plugin

[dev-triboo]

But, the real point is: why you introduced this "Enhanced Slack sharing" buggy feature that invalidates all my AMP pages? In which way is related to SEO?

[AndrewMLeonard]

@dev-triboo You should read the information in SEO>General>Features>Enhanced Slack sharing and this is what it says:
This adds an author byline and reading time estimate to the article’s snippet when shared on Slack. Find out how a rich snippet can improve visibility and click-through-rate.
This is a useful feature but unfortunately this code has unintended consequences that corrupts the AMP stuff
So I think their intentions are good but the sad thing is that they are not addressing this bug perhaps as quickly as we might wish

[kasey-posterity]

Agreed with @dev-triboo. AMP invalidation leads to the automatic removal of pages from Top Stories.

[Djennez]

This should be fixed with the 15.2.1 release of today (https://yoast.com/wordpress/plugins/seo/change-log-wordpress-seo/) so I'm closing this.