Cooldown module make the minecraft crash

[Taoist-Yu]

Describe the bug

• The cooldown module crashed.

Steps to reproduce the behavior

• 1. I have installed the core module, basic module and cooldown module to the client.
• 2. Run the game then crashed.

Environment information

• Project Essentials Permissions version: [I dont have installed this module]
• Project Essentials Core version: [v2.1.0]
• Project Essentials Cooldown version: [v1.0.2]
• Project Essentials Modules version: [Core - v2.1.0; Basic- v2.0.1; Cooldown - v1.0.2]
• Minecraft / Forge version: [1.15.2 / 31.2.47]

Additional context

• When I just add core and basic module, it woked.

Log files. (latest.log and debug.log file in attachment)

latest.log
debug.log