Fatal error: Uncaught Error: Class "Composer\Installers\BaseInstaller" not found in /home/tcalculu/pmtdemo.tcalculus.com/wp-cont/pmt.tcalculus.com/wp-content/pluginsent/plugins/woocommerce/vendor/composer/installers/src/Composer/Installers/MantisBTInstaller.php:6 Stack trace: #0 {main} thrown in /home/tcalculu/pmtdemo.tcalculus.com/wp-cont/pmt.tcalculus.com/wp-content/pluginsent/plugins/woocommerce/vendor/composer/installers/src/Composer/Installers/MantisBTInstaller.php on line 6