Sathyavrathan PK

@pothi Thank you so much, installed php7.0-xml fixed the issue.

In one of my website on nginx it is showing the below error in amp url, is this same error? will this also be fixed in the next release?
Screenshot: https://prntscr.com/gs6j5k

Fatal error: Uncaught Error: Class ‘DOMDocument’ not found in /home/WEBSITE/wp/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/utils/class-amp-dom-utils.php:7 Stack trace: #0 /home/WEBSITE/wp/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/class-amp-content.php(98): AMP_DOM_Utils::get_dom_from_content(‘<p>WordPress 4….’) #1 /home/WEBSITE/wp/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/class-amp-content.php(85): AMP_Content_Sanitizer::sanitize(‘<p>WordPress 4….’, Array, Array) #2 /home/WEBSITE/wp/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/class-amp-content.php(46): AMP_Content->sanitize(‘<p>WordPress 4….’) #3 /home/WEBSITE/wp/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/class-amp-content.php(22): AMP_Content->transform() #4 /home/WEBSITE/wp/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/class-amp-post-template.php(242): AMP_Content->__const in /home/WEBSITE/wp/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/utils/class-amp-dom-utils.php on line 7