[Linux Server] Compile errors

[tinygrox]

Env: Ubuntu Server 20.04 LTS 64bit
Sourcemod version:1.12 dev build
Problem: I tried to compile a plugin made by others, and then I encountered this:

SourcePawn Compiler 1.12.0.6920
Copyright (c) 1997-2006 ITB CompuPhase
Copyright (c) 2004-2021 AlliedModders LLC

./include/kento_rankme/rankme.inc(49) : error 400: function "GetData" must return a value
./include/kento_rankme/rankme.inc(393) : error 400: function "GetData" must return a value

The function GetData in rankme.inc:

int GetData(int[] data) {
    data[0] = this.KNIFE;
    data[1] = this.GLOCK;
    .....
    data[41] = this.BREACHCHARGE;
}

the .sp file [ author by manicogaming ]
bot_inventory.zip

Don't know

[Risusama]

This issue is also present on Sourcemod 1.11 (which is now stable) and I just had to update to it from 1.10 since 21st of October 2022 CSGO update broke Sourcemod & Metamod.
Basically our servers are now without rankme.