Cannot activate the plugin

I am getting the following error when activating this plugin:

Plugin could not be activated because it triggered a fatal error.
( ! ) Fatal error: Undefined class constant 'AGENTS' in
https://www.techanger.com/wp-content/plugins/lite-cache/admin.php on line 20
Call Stack
#	Time	Memory	Function	Location
1	0.0026	404576	{main}( )	..\plugins.php:0
2	0.6751	25527816	do_action( )	..\plugins.php:150
3	0.6752	25529304	call_user_func_array ( )	..\plugin.php:406
4	0.6752	25529336	LiteCacheAdmin->hook_activate( )	..\plugin.php:406

I really want to use this plugin. I’m using Hyper Cache for the time being.
https://www.ads-software.com/extend/plugins/lite-cache/