Drupal AMP Throwing a 500 Error with the ?amp on the URL
I encountered an issue attempting to setup a Drupal site with AMP, when adding the ?amp to the end of the URL I would simply hit a 500 error in the browser. Interestingly enough the clean URL validated on Google's AMP Test.
What I Tried
- Tested with several available versions of the AMP Library
- Tested in multiple versions of Drupal
- Tested in various server environments with slightly different versions of PHP
In the end I loaded a fresh copy of Drupal and AMP 7.x-1.0
As it turns out I had checked "Power User: Run the whole HTML page through the AMP library" on all of my test sites and this is what caused the ?amp to throw a 500 error. Once I un-checked this the problem went away.
One Slight Issue...
I noticed the [Test that AMP is configured properly] button still throws a 500 error. I opened an issue on the Drupal forums to see if anyone has any ideas on what might still be causing this.