For whatever reason z.lua was broken, maybe a lua update. Not familiar with lua itself.
The rank is stored as a comma-float-number (e.g. 1,23) but tonumber() does not de-serialize that properly. After substituting "," with "." before calling tonumber() it worked well again.
Environment:
- Windows Terminal
- Clink v1.3.39.404510
- Lua 5.4.3
- z.lua 1.8.16