Not activates on my site

Hi, I installed it but can’t activate it. WP shows error: can’t activate it becaouse of fatal error:
Warning: include(/var/www/clients/client198/web492/web/wp-content/plugins/wpmobileapp/vendor/nette/caching/src/Caching/Storages/FileStorage.php): failed to open stream: No such file or directory in /var/www/clients/client198/web492/web/wp-content/plugins/flexible-shipping/vendor/composer/ClassLoader.php on line 444

Warning: include(/var/www/clients/client198/web492/web/wp-content/plugins/wpmobileapp/vendor/nette/caching/src/Caching/Storages/FileStorage.php): failed to open stream: No such file or directory in /var/www/clients/client198/web492/web/wp-content/plugins/flexible-shipping/vendor/composer/ClassLoader.php on line 444

Warning: include(): Failed opening ‘/var/www/clients/client198/web492/web/wp-content/plugins/wpmobileapp/vendor/nette/caching/src/Caching/Storages/FileStorage.php’ for inclusion (include_path=’.:/usr/share/php:/usr/share/pear’) in /var/www/clients/client198/web492/web/wp-content/plugins/flexible-shipping/vendor/composer/ClassLoader.php on line 444

Fatal error: Class ‘Nette\Caching\Storages\FileStorage’ not found in /var/www/clients/client198/web492/web/wp-content/plugins/wpmobileapp/includes/class-wpma-module-cache.php on line 25

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