Found the problem, you have not enabled any auto close. You need to enable at least 1 auto close, enable what you want the plugin to close automatically
"Auto Closing Configuration": {
"Player Can Pickup Door Closer. (Default: TRUE)": true,
"Enable automatic closing of Door. (Default: FALSE)": false,
"Enable automatic closing of Double Door. (Default: FALSE)": false,
"Enable automatic closing of Garage. (Default: FALSE)": false,
"Enable automatic closing of Ladder Hatch. (Default: FALSE)": false,
"Enable automatic closing of External Gate. (Default: FALSE)": false,
"Enable automatic closing of Fence Gate. (Default: FALSE)": false,
"Enable automatic closing of Legacy Wood Shelter Door. (Default: FALSE)": false,
"Minimum Closing Delay Time. (Default: 10 seconds)": 10,
"Maximum Closing Delay Time. (Default: 60 seconds)": 60,
"Default Closing Delay Time. (Default: 30 seconds)": 30
},