Fatal error: Uncaught Error: Cannot instantiate interface Magefan\Blog\Api\AuthorInterface in /home3/nelbo/public_html/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:50 Stack trace: #0 /home3/nelbo/public_html/vendor/magento/framework/ObjectManager/ObjectManager.php(56): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magefan\\Blog\\Ap...', Array) #1 /home3/nelbo/public_html/generated/code/Magefan/Blog/Api/AuthorInterfaceFactory.php(43): Magento\Framework\ObjectManager\ObjectManager->create('\\Magefan\\Blog\\A...', Array) #2 /home3/nelbo/public_html/app/code/Magefan/Blog/Model/Post.php(784): Magefan\Blog\Api\AuthorInterfaceFactory->create() #3 /home3/nelbo/public_html/app/code/Magefan/Blog/Block/Post/View/Richsnippets.php(75): Magefan\Blog\Model\Post->getAuthor() #4 /home3/nelbo/public_html/app/code/Magefan/Blog/Block/Post/View/Richsnippets.php(41): Magefan\Blog\Block\Post\View\Richsnippets->getAuthor() #5 /home3/nelbo/public_html/app/code/Magefan/Blog/Block/Post/View/Richsnippets. in /home3/nelbo/public_html/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php on line 50