Why isn't this detecting the RemoteEvent?

I'm trying to fire to the server to damage the player when they get shot, but it gives me the error "Infinite yield possible on 'ReplicatedStorage:WaitForChild("semiEvent")'".

LocalScript:

-- Variables

local UserInputService = game:GetService("UserInputService")

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()

local tool = script.Parent

local equipped = false
-- Raycasting Function

local function semiFire()
    local camera = workspace.CurrentCamera

    local semiParams = RaycastParams.new()
    semiParams.FilterDescendantsInstances = {} 
    semiParams.FilterType = Enum.RaycastFilterType.Blacklist

    local function semiResult(x, y)
        local unitRay = camera:ScreenPointToRay(mouse.x, mouse.y)
        return workspace:Raycast(unitRay.Origin, unitRay.Direction * 500, semiParams)
    end

    local semiResultV = semiResult()

    if semiResultV then
        local hitPart = semiResultV.Instance
        local humanoid = hitPart.Parent:FindFirstChild("Humanoid")
        if not humanoid then
            local humanoid = hitPart.Parent.Parent:FindFirstChild("Humanoid")
        end
        if not humanoid then end
        if humanoid then 
            print("shoot person (blehh)")
            local ReplicatedStorage = game:GetService("ReplicatedStorage")
            local semiEvent = ReplicatedStorage:WaitForChild("semiEvent")
            semiEvent:FireServer(humanoid)
        end
    end
end
-- Equip / Unequip

tool.Equipped:Connect(function(mouse)
    equipped = true
end)

tool.Unequipped:Connect(function(mouse)
    equipped = false
end)

-- Firing


UserInputService.InputBegan:Connect(function(input)
    if equipped == true then
        if input.UserInputType == Enum.UserInputType.MouseButton1 then
            semiFire()
            print("shoot (kaboom)")
        end
    end
end)


UserInputService.InputEnded:Connect(function(input)
    if equipped == true then
        if input.UserInputType == Enum.UserInputType.MouseButton1 then

        end
    end
end)

Script:

local semiEvent = Instance.new("RemoteEvent", game:GetService("ReplicatedStorage"))
semiEvent.Name = "semiEvent"

local function onSemiEventFired(humanoid)
    humanoid:TakeDamage(35)
end

semiEvent.OnServerEvent:Connect(onSemiEventFired)