{"id":23982,"date":"2021-08-30T10:35:50","date_gmt":"2021-08-30T14:35:50","guid":{"rendered":"https:\/\/plumrocket.com\/docs\/?p=23982"},"modified":"2022-04-20T10:37:41","modified_gmt":"2022-04-20T14:37:41","slug":"fatal-error-interface-ampprojectoptimizertransformer-not-found","status":"publish","type":"post","link":"https:\/\/plumrocket.com\/docs\/magento-amp\/v3\/troubleshooting\/amp-optimizer-not-found","title":{"rendered":"Fatal Error: Interface ‘AmpProject\\Optimizer\\Transformer’ not found"},"content":{"rendered":"\n

Error messages:<\/strong> <\/p>\n\n\n\n

Fatal error: Interface ‘AmpProject\\Optimizer\\Transformer’ not found in app\/code\/Plumrocket\/AmpComponent\/Model\/RemoveUnusedExtensionsTransformer.php.<\/p><\/blockquote>\n\n\n\n

or<\/p>\n\n\n\n

Exception (ReflectionException): Class AmpProject\\Optimizer\\ErrorCollectionFactory does not exist<\/p><\/blockquote>\n\n\n\n

Issue Description<\/h2>\n\n\n\n

Most likely, you are experiencing this fatal error after installing the AMP extension<\/a> via FTP and running bin\/magento setup:di:compile<\/code>. <\/p>\n\n\n\n

However, running this command is not enough to complete the installation. Please make sure to follow our AMP Installation<\/a> or Upgrading<\/a> guide so that you don\u2019t miss any required steps. <\/p>\n\n\n\n

In this case, you probably missed installing the AMP Toolbox, which is a crucial and required tool for the AMP extension to work properly. It helps increase Core Web Vitals score on AMP pages and convert CMS content to AMP HTML format.<\/p>\n\n\n\n

Solution 1 (using Composer)<\/h2>\n\n\n\n

It is likely that you have not installed all the composer packages, so follow the next steps to fix it.<\/p>\n\n\n\n

Step 1<\/h3>\n\n\n\n

Run the following command to install the required composer AMP Toolbox for PHP<\/a> and Google reCAPTCHA<\/a> packages:<\/p>\n\n\n\n

<\/div>
composer require ampproject\/amp-toolbox ^0.9\ncomposer require google\/recaptcha ^1.2<\/code><\/pre><\/div>\n\n\n\n
Step 2 (optional)<\/h3>\n\n\n\n
We also recommend you to install the WebP Convert composer package<\/a> for the built-in support of WebP:<\/p>\n\n\n\n
<\/div>
composer require rosell-dk\/webp-convert<\/code><\/pre><\/div>\n\n\n\n
Solution 2 (using FTP)<\/h2>\n\n\n\n
If you cannot use Composer to install the missing library, you should follow the next steps:<\/p>\n\n\n\n
  1. Go to the Magento root directory<\/li>
  2. Download autoloader by running the\u00a0following command<\/li><\/ol>\n\n\n\n
    <\/div>
    git clone https:\/\/github.com\/plumrocket\/amp-toolbox-php-loader.git lib\/internal\/Plumrocket\/AmpProject<\/code><\/pre><\/div>\n\n\n\n
    1. Download AMP Toolbox for PHP:<\/li><\/ol>\n\n\n\n
      <\/div>
      git clone https:\/\/github.com\/ampproject\/amp-toolbox-php.git lib\/internal\/Plumrocket\/AmpProject\/amp-toolbox-php<\/code><\/pre><\/div>\n\n\n\n
      <\/p>\n","protected":false},"excerpt":{"rendered":"
      Error messages: Fatal error: Interface ‘AmpProject\\Optimizer\\Transformer’ not found in app\/code\/Plumrocket\/AmpComponent\/Model\/RemoveUnusedExtensionsTransformer.php. or Exception (ReflectionException): Class AmpProject\\Optimizer\\ErrorCollectionFactory does not exist Issue Description Most likely, you are experiencing this fatal error after installing the AMP extension via FTP and running bin\/magento setup:di:compile. However, running this command is not enough to complete the installation. Please make sure to follow … <\/p>\n
      Continue reading “Fatal Error: Interface ‘AmpProject\\Optimizer\\Transformer’ not found”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[106],"tags":[],"yoast_head":"\nFatal Error: Interface 'AmpProject\\Optimizer\\Transformer' not found - Plumrocket Documentation<\/title>\n<meta name=\"description\" content=\"Error messages: Fatal error: Interface 'AmpProjectOptimizerTransformer' not found in\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/plumrocket.com\/docs\/magento-amp\/v3\/troubleshooting\/amp-optimizer-not-found\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fatal Error: Interface 'AmpProject\\Optimizer\\Transformer' not found\" \/>\n<meta property=\"og:description\" content=\"Error messages: Fatal error: Interface 'AmpProject\\Optimizer\\Transformer' not found in\" \/>\n<meta property=\"og:url\" content=\"https:\/\/plumrocket.com\/docs\/magento-amp\/v3\/troubleshooting\/amp-optimizer-not-found\" \/>\n<meta property=\"og:site_name\" content=\"Plumrocket Documentation\" \/>\n<meta property=\"article:published_time\" content=\"2021-08-30T14:35:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-04-20T14:37:41+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Plumrocket\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Fatal Error: Interface 'AmpProject\\Optimizer\\Transformer' not found - 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