Hey,
I updated Memory to Spigot 1.16.
This includes changing items from ID to their type. This also affects the configuration, so checkout the new config in the README.
You can find the plugin jar in the attached resources.
Note: The source is 3 years old. If I have some free time, I will try to improve the code quality and add some requested (just open an issue) features.
Greetings, Paul.