Classic SEO is the first SEO plugin built specifically to work with ClassicPress. A fork of Rank Math, the plugin contains many essential SEO tools to help optimize your website.
PHP Fatal error: Uncaught TypeError: Return value of Composer\Autoload\ClassLoader::initializeIncludeClosure() must be an instance of Composer\Autoload\void, none returned in .../ClassicPress/src/wp-content/plugins/classicpress-seo/vendor/composer/ClassLoader.php:580
Stack trace:
#0 .../ClassicPress/src/wp-content/plugins/classicpress-seo/vendor/composer/ClassLoader.php(112): Composer\Autoload\ClassLoader::initializeIncludeClosure()
#1 .../ClassicPress/src/wp-content/plugins/classicpress-seo/vendor/composer/autoload_real.php(28): Composer\Autoload\ClassLoader->__construct('/Users/simo/Sit...')
#2 .../ClassicPress/src/wp-content/plugins/classicpress-seo/vendor/autoload.php(25): ComposerAutoloaderInit531772699595bd84a6a8fd835c733f0b::getLoader()
#3 .../ClassicPress/src/wp-content/plugins/classicpress-seo/classicpress-seo.php(266): include('/Users/simo/Sit...')
#4 .../ClassicPress/src/wp-content/plugins/classicpress-seo/classicpress-seo.php(183): in .../ClassicPress/src/wp-content/plugins/classicpress-seo/vendor/composer/ClassLoader.php on line 580
Can't find Composer requiring a PHP version > 7.0.
Possible solutions:
Fix the issue
Bump required PHP to 7.4 for version 2.2.0 (breaking SemVer)
PHP Fatal error: Uncaught TypeError: Return value of Composer\Autoload\ClassLoader::initializeIncludeClosure() must be an instance of Composer\Autoload\void, none returned in .../ClassicPress/src/wp-content/plugins/classicpress-seo/vendor/composer/ClassLoader.php:580
Can't find Composer requiring a PHP version > 7.0.
Possible solutions: