My best guess that its a problem with the Zombie gamemode, TDM gamemode, Tierstick grenade, and Tierfrag grenade. From the looks of it, there's a stuffload of errors from it:
(This is all one line)
ERROR: getBL_IDfromObject() - "" is not an object
BackTrace: ->RotNormalZombie::OnCollision->[BotEvents]Armor::OnCollision->[TeamDeathmatch]Armor::OnCollision->[ZombieOverwritePackage]Armor::OnCollision->[c4]Armor::OnCollision->[tierstickGrenadePackage]Armor::OnCollision->[tierfragGrenadePackage]Armor::OnCollision->[AmmoStaticPackage11]Armor::OnCollision->[AmmoStaticPackage10]Armor::OnCollision->[AmmoStaticPackage8]Armor::OnCollision->[AmmoStaticPackage7]Armor::OnCollision->[TeamDeathmatch]miniGameCstar fishe->[BuilderMode]miniGameCstar fishe->miniGameCstar fishe->getBL_IDFromObject