That error makes server unable to give chat info about XP gained/recieved after a kill.
] sm plugin list
SourceMod 1.5.0-dev+3738, by AlliedModders LLC
To see running plugins, type "sm plugins"
To see credits, type "sm credits"
Visit http://www.sourcemod.net/
] sm plugins
"Admin File Reader" (1.5.0-dev+3738) by AlliedModders LLC
"Deathmatch" (1.5) by |NA| Snip3r
"W3S Engine Database Connect" (1.0) by Ownz (DarkEnergy)
"Client Preferences" (1.5.0-dev+3738) by AlliedModders LLC
"Basic Commands" (1.5.0-dev+3738) by AlliedModders LLC
"W3S Engine Command Hooks" (1.0) by Ownz (DarkEnergy)
"Race - Blood Hunter" (1.0) by Ownz (DarkEnergy)
"WCX - Vampirism Engine" (0.2) by Necavi, Anthony Iacono, Glider
"W3S Engine Race Class" (1.0) by Ownz (DarkEnergy)
"Engine Obj test" (1.0) by Ownz
To see more, type "sm plugins 11"
] sm plugins 22
"W3S Engine Item2 Database" (1.0) by Ownz (DarkEnergy)
"War3Source Shop - Shield" (1.0) by Vulpone&Revan
"War3Source war3menu" (1.0) by Ownz (DarkEnergy)
"Race - Rainbow Dash" (1.0) by OWNAGE
"Race - Rarity" (1.0) by OWNAGE
"WCX - Crit/Damage Engine" (0.1) by necavi
"War3Source Admin Console" (1.0) by Ownz (DarkEnergy)
"War3Source Buff MAXHP" (1.1) by Ownz (DarkEnergy)
"Race - Human Alliance" (1.0) by PimpinJuice, necavi
"W3S Engine Aura" (1.0) by Ownz (DarkEnergy)
"W3S Engine Item2 Ownership" (1.0) by Ownz (DarkEnergy)
To see more, type "sm plugins 33"
] sm plugins 33
"W3S Engine System Check" (1.0) by Ownz (DarkEnergy)
"War3Source Race - Luna Moonfang" (1.0) by Jareth&DonRevan
"W3S Addon - Ammo Control" (1.0) by Frenzzy
"War3Source Buff System" (1.0) by Ownz (DarkEnergy)
"War3Source SHSource switch" (1.0) by Ownz
"W3S Engine player class" (1.0) by Ownz (DarkEnergy)
"Race - Warden" (1.0.0.0) by PimpinJuice & Ownz (DarkEnergy)
"W3S Engine Race Factions" (1.0) by Revan
"W3S Engine Damage" (1.0) by Ownz (DarkEnergy)
"War3Source Menu spendskills" (1.1) by Ownz (DarkEnergy)
"SuperHero Source" (0.2.2) by PimpinJuice and Ownz (DarkEnergy)
To see more, type "sm plugins 44"
] sm plugins 44
"War3Source - Race Restrictions" (1.0) by Ownz (DarkEnergy)
"W3S Engine Item Class" (1.0) by Ownz (DarkEnergy)
"Race - Scout" (1.0.0.0) by Ownz
"Engine Log Error" (1.0) by Ownz
"Race - Orcish Horde" (1.0.0.0) by PimpinJuice
"W3S - Shopitems" (1.0.0.0) by PimpinJuice
"W3S Engine Cooldown Manager" (1.0) by Ownz (DarkEnergy)
"War3Source Engine Skill Dependency" (1.0) by Vulpone & DonRevan
"Race - Undead Scourge" (1.0) by PimpinJuice, Necavi
"W3S Engine Player Collisions" (1.0) by Ownz (DarkEnergy)
"WCX RPG Text Display" (0.1) by necavi
To see more, type "sm plugins 55"
] sm plugins 55
"W3S Engine Stats sockets 2" (1.0) by Ownz (DarkEnergy)
"W3S Engine Model CS" (1.2) by blodia, DonRevan
"WCX - Fake NPC" (0.5) by DonRevan
"War3Source Menus itemsinfo" (1.0) by Ownz (DarkEnergy)
"War3Source" (1.2.4.1) by PimpinJuice and Ownz (DarkEnergy)
"W3S Engine Buff Tracker (Buff helper)" (1.0) by Ownz (DarkEnergy)
"WCX - Dodge Engine" (0.1) by necavi, Anthony Iacono
"W3S Engine HP Regen" (1.1) by Ownz (DarkEnergy) - Fixed up by Glider
"Race - Blood Mage" (1.0.0.0) by PimpinJuice & Ownz (DarkEnergy)
"Race - Hammerstorm" (1.2) by Glider
"Race - Twilight SPARKELLLLEEEE" (1.0) by Ownz
To see more, type "sm plugins 66"
] sm plugins 66
"War3Source Shop - Helm" (1.0) by Ownz (DarkEnergy)
"War3Source help menu" (1.0) by Ownz (DarkEnergy)
"W3S Engine Item Ownership" (1.0) by Ownz (DarkEnergy)
"War3Source Extension Wrapper" (1.0) by Ownz
"WCX - Wards" (0.1) by Invalid, necavi, PimpinJuice
"War3Source Addon - XP Multipler" (1.0) by DonRevan
"War3Source Menus changerace" (1.0) by Ownz (DarkEnergy)
"War3Source Menus Shopmenus 2" (1.0) by Ownz (DarkEnergy)
"War3Source Events" (1.0) by Ownz (DarkEnergy)
"W3S Engine Player Trace" (1.0) by Ownz (DarkEnergy)
"Race - Sacred Warrior" (1.1) by Glider / modified by Ownz (DarkEnergy)
To see more, type "sm plugins 77"
] sm plugins 77
"Race - Shadow Hunter" (1.0.0.0) by PimpinJuice & Ownz (DarkEnergy)
"Race - Night Elf" (1.0.0.0) by PimpinJuice
"W3S Engine Item Class 2" (1.0) by Ownz (DarkEnergy)
"Race - Crypt Lord" (1.0.0.0) by PimpinJuice & Ownz (DarkEnergy)
"Race - Lifestealer" (1.0) by Stinkyfax and Ownz (DarkEnergy)
"Race - Soul Reaper" (1.0) by Ownz (DarkEnergy)
"War3Source - Ward Behavior Definitions" (1.0) by Invalid
"War3Source war3admin" (1.0) by Ownz (DarkEnergy)
"War3Source Menus itemsinfo" (1.0) by Ownz (DarkEnergy)
"W3S Engine LevelBank" (1.0) by Ownz (DarkEnergy)
"Race - Chronos" (1.0.0.0) by Ownz (DarkEnergy)
To see more, type "sm plugins 88"
] sm plugins 88
"W3S Engine Database top100" (1.0) by Ownz (DarkEnergy)
"War3Source - Addon - Bot Control" (1.3) by Glider
"WCX - Skills Engine" (0.1) by necavi, Anthony Iacono
"Race - Dark Elf" (1.0.0.0) by Smilax & Glider helped a lot :D
"War3Source Buff Speed" (1.0) by Ownz (DarkEnergy)
"W3S - Shopitems2" (1.0.0.0) by Ownz
"W3S Addon - ClanBonusXP" (1.1.0.0) by alex0310 & Revan
"WCX Bash" (0.1) by necavi
"W3S Engine Trie Key Value" (1.0) by Ownz (DarkEnergy)
"W3S - Addon - Display Particles on Level Up" (1.2) by Glider & xDr.HaaaaaaaXx
"W3S Engine Death Weapons" (1.0) by Ownz (DarkEnergy)
To see more, type "sm plugins 99"
] sm plugins 99
"Basic Info Triggers" (1.5.0-dev+3738) by AlliedModders LLC
"Basic Comm Control" (1.5.0-dev+3738) by AlliedModders LLC
"Admin Help" (1.5.0-dev+3738) by AlliedModders LLC
"Anti-Flood" (1.5.0-dev+3738) by AlliedModders LLC
"Reserved Slots" (1.5.0-dev+3738) by AlliedModders LLC
"Nextmap" (1.5.0-dev+3738) by AlliedModders LLC
"Fun Commands" (1.5.0-dev+3738) by AlliedModders LLC
"Basic Votes" (1.5.0-dev+3738) by AlliedModders LLC
"Sound Commands" (1.5.0-dev+3738) by AlliedModders LLC
"Fun Votes" (1.5.0-dev+3738) by AlliedModders LLC
"Player Commands" (1.5.0-dev+3738) by AlliedModders LLC
To see more, type "sm plugins 110"
] sm plugins 110
"Basic Ban Commands" (1.5.0-dev+3738) by AlliedModders LLC
"Basic Chat" (1.5.0-dev+3738) by AlliedModders LLC
"W3S Engine Database save xp" (1.0) by Ownz (DarkEnergy)
"Admin Menu" (1.5.0-dev+3738) by AlliedModders LLC