HTTP ERROR 500

Same issue here. What happened!?

This is the result of two independent teams working on a common goal. The issue is most likely due to the issue mentioned here with Yoast. https://www.ads-software.com/support/topic/the-latest-amp-plugin-cause-500-error/ we have made a fix and requested a change to their plugin and are awaiting a response. Please read the thread on the link for more.

That’s right.

@halim81 @seph If you’re using the Glue for Yoast SEO & AMP plugin, then then the error is most likely caused by it. As mentioned in that support thread, here is a temporary workaround you can add to your custom theme or custom plugin to fix the fatal error caused by the Yoast plugin: https://github.com/Yoast/yoastseo-amp/pull/89#issuecomment-386676100

We’ve submitted a permanent fix to the Yoast Glue plugin as well.