StarterGui:SetCore must be called from a local script - lua

Question

So... I am trying to explode everyone and send them a message but it is not working. Here is the code.
Serverside:
local gui = game:GetService("StarterGui")
local Players = game:GetService("Players")
local pp = game:GetService("ProximityPromptService")
local phone = game:GetService("ReplicatedStorage")
local world = game.Workspace
local function pptrig (obj, ply)
for i,v in pairs(game.Players:GetChildren()) do
local player = world:FindFirstChild(v.Name)
local nuke = Instance.new("Explosion", world)
nuke.BlastRadius = 0.9
nuke.BlastPressure = 1000000
nuke.Position = player.HumanoidRootPart.Position
print("run")
phone.Exploded:FireClient(v, v.Name, ply.Name)
end
end
pp.PromptTriggered:Connect(pptrig)
Clientside:
local phone = game:GetService("ReplicatedStorage")
local gui = game:GetService("StarterGui")
gui:SetCore("test", {Text = "Ran"})
local function humiliation(me, ply)
gui:SetCore("test", {Text = "Ran"})
if ply ~= me then
gui:SetCore("Humiliation", {
Title = "Exploded!",
Text = "You have been exploded by "..ply..".",
Duration = 10,
})
elseif ply == me then
gui:SetCore("Humiliation", {
Title = "Exploded!",
Text = "You, "..me..", exploded yourself."
})
end
end
phone.Exploded.OnClientEvent:Connect(humiliation())
When I try to run it it gives me this:
StarterGui:SetCore must be called from a local script. (x2) - Studio
Players.GoldenRStar.PlayerGui.Script:19: attempt to concatenate nil with string - Server - Script:19
Exploded is a remote event and I wanted to Explode everyone and send them a message:
"You have been exploded by GuyThatPressesButtons." and
"You, GuyThatPressesButtons, exploded yourself."
this program tries to loop though every player, explodes them and sends them a fire from the remote event Exploded, then a client script catches it and processes it acordingly.
on the fire, it is sent the players name: v.Name and the player that pressed the button, on the client script both values are nil.