Fatal Error when activating the plugin

Fatal error: Uncaught Error: Undefined class constant ‘VERSION’ in /var/www/html/wp-content/plugins/ilab-media-tools/vendor/ilab/ilab-aws-media-cloud-sdk/src/functions.php:266 Stack trace: #0 /var/www/html/wp-content/plugins/ilab-media-tools/vendor/ilab/ilab-aws-media-cloud-sdk/src/ClientResolver.php(567): ILABAmazon\default_http_handler() #1 /var/www/html/wp-content/plugins/ilab-media-tools/vendor/ilab/ilab-aws-media-cloud-sdk/src/ClientResolver.php(276): ILABAmazon\ClientResolver::_default_handler(Array) #2 /var/www/html/wp-content/plugins/ilab-media-tools/vendor/ilab/ilab-aws-media-cloud-sdk/src/AwsClient.php(177): ILABAmazon\ClientResolver->resolve(Array, Object(ILABAmazon\HandlerList)) #3 /var/www/html/wp-content/plugins/ilab-media-tools/vendor/ilab/ilab-aws-media-cloud-sdk/src/S3/S3Client.php(283): ILABAmazon\AwsClient->__construct(Array) #4 /var/www/html/wp-content/plugins/ilab-media-tools/vendor/ilab/ilab-aws-media-cloud-sdk/src/MultiRegionClient.php(51): ILABAmazon\S3\S3Client->__construct(Array) #5 /var/www/html in /var/www/html/wp-content/plugins/ilab-media-tools/vendor/ilab/ilab-aws-media-cloud-sdk/src/functions.php on line 266