( ! ) Fatal error: Trait 'Aws\S3\CalculatesChecksumTrait' not found in C:\wamp64\www\ws\aws\Aws\S3\ApplyChecksumMiddleware.php on line 20
Call Stack
#	Time	Memory	Function	Location
1	0.0467	404088	{main}( )	...\ApplyChecksumMiddleware.php:0