[MihailoZ]

Originally Posted by LearninG You don't have that function in functions folder. and about plugin_precache error , show the function.

I do have: https://prnt.sc/p8ac7p

{
    "name" : "InstallGameRules",
    "library" : "mod",
    "return" : 
    {
        "type" : "CHalfLifeMultiplay *"
    },
    "identifiers":
    [
        {
            "os" : "windows",
            "mod" : "cstrike",
            "value" : [0x68,"*","*","*","*",0xFF,"*","*","*","*","*",0x83,0xC4,0x4,0xFF,"*","*","*","*","*",0xA1,"*","*","*","*",0xD9,0x40,0x14],
			"info" : "Works for Condition Zero"
        },
        {
            "os" : "linux",
            "mod" : "cstrike",
            "value" : "_Z16InstallGameRulesv"
        },
		{
            "os" : "windows",
            "mod" : "SvenCoop",
            "value" : [0x55,0x8B,0xEC,0x6A,0xFF,0x68,"*","*","*","*",0x64,"*","*","*","*","*",0x50,0x81,"*","*","*","*","*",0xA1,"*","*","*","*",0x33,0xC5,0x89,0x45,0xF0]
        },
		{
			"os" : "windows",
			"mod" : "ns",
			"value" : [0x6A,0xFF,0x68,"*","*","*","*",0x64,"*","*","*","*","*",0x50,0x64,"*","*","*","*","*","*",0x51,0x68]
		},
		{
			"os" : "linux",
			"mod" : "ns",
			"value" : "_Z16InstallGameRulesv"
		},
		{
			"os" : "windows",
			"mod" : "dod",
			"value" : [0x55,0x8B,0xEC,0x83,0xEC,0x48,0x53,0x56,0x57,0x68,"*","*","*","*",0xFF,"*","*","*","*","*",0x83,0xC4,0x04,0xFF]
		},
		{
			"os" : "linux",
			"mod" : "dod",
			"value" : "_Z16InstallGameRulesv"
		},
		{
			"os" : "windows",
			"mod" : "valve",
			"value" : [0x68,"*","*","*","*",0xFF,"*","*","*","*","*",0x83,0xC4,0x04,0xFF,"*","*","*","*","*",0x8B]
		},
		{
			"os" : "linux",
			"mod" : "valve",
			"value" : "_Z16InstallGameRulesv"
		},
		{
			"os" : "windows",
			"mod" : "ts",
			"value" : [0x6A,0xFF,0x68,"*","*","*","*",0x64,"*","*","*","*","*",0x50,0x64,"*","*","*","*","*","*",0x51,0x56,0x68]
		},
		{
			"os" : "linux",
			"mod" : "ts",
			"value" : "_Z16InstallGameRulesv"
		}		 
    ]
}

This is the function:

public OnInstallGameRules()
    g_pGameRules = OrpheuGetReturn()