McMMO is not progressing XP for mining or any skills

[therealaqz]

Hello there!

Hey, I've been having an issue with McMMO in between versions (1.21.5) and (1.21.8). On both versions, it does not level up progression for any skills like MINING.

Plugins I am using:

- SuperiorSkyblock2-2025.1-b577.jar
- SSBSlimeWorldManager-2025.1-b35.jar
- McMMO

Server version:

This server is running AdvancedSlimePaper version 1.21.8-16754-paper_upstream@8d4c825 (2025-08-19T15:58:39Z) (Implementing API version 1.21.8-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.5-16664-2f6040b (MC: 1.21.5)

This issue has persisted across multiple servers, and neither resetting the configuration nor migrating to a more recent server version has resolved it. No errors are reported in the console at all.