Fatal error class PHP not found

Hello
I get this error when I update the plugin can you help plz ?

PHP Fatal error: Uncaught Error: Class ‘UserAccessManager\\Wrapper\\Php’ not found in /…/wp-content/plugins/user-access-manager/init.php:38\nStack trace:\n#0 /…/wp-content/plugins/user-access-manager/user-access-manager.php(75): initUserAccessManger()\n#1 /…/wp-settings.php(305): include_once(‘/…/…’)\n#2 /var/www/infos/wp-config.php(124): require_once(‘/…/…’)\n#3 /…/wp-load.php(37): require_once(‘/…/…’)\n#4 /…/wp-blog-header.php(13): require_once(‘/…/…’)\n#5 /…/index.php(17): require(‘/…/…’)\n#6 {main}\n thrown in /…/wp-content/plugins/user-access-manager/init.php on line 38