Why does this error? "SampleText" is not a valid member of

try this, Ive made some changes to what you have to make sure it doesn't error out...

local toolio = script.Parent
local Sounds = toolio.Handle.Sounds
local MPART = "SampleText"

--// new function to grab the player and the character from a part
function getCharacterAndPlayerfrom(part)
	local ws = part.Parent
	local Char
	local Player
	while ws ~= workspace do
		Char = ws
		ws = ws.parent
		if(ws == workspace) then
			break
		end
	end
	if(Char ~= nil) then
		Player = game.Players:getPlayerFromCharacter(Char)
	end
	return Player, Char
end

function work(_,hit)
    if hit:IsA("Part") or hit:IsA("MeshPart") then
       --[[ if hit.Parent.ClassName ~= "Accessory" then
            if hit.Parent:FindFirstChild("Humanoid") then
                plr = hit.Parent
            end
        elseif hit.Parent.ClassName == "Accessory" then
            plr = hit.Parent.Parent
        end]]
		local Player,Char = getCharacterAndPlayerfrom(hit)
		
		if(Char ~= nil) then
		--// is this part meant to be inside the player not the character? if it is then change Char to Player!
			if Char:FindFirstChild("PLRcrushed") then
				print("Player has been crushed already")
			else
				if Char.Humanoid.RigType == Enum.RigType.R6 then
					MPART = "Torso"
				elseif Char.Humanoid.RigType == Enum.RigType.R15 then
					MPART = "LowerTorso"
				else
				--// Something else touched us 
					warn(hit,"[",hit.Parent,"] Touched us!!, \n Setting MPART to ERROR!", debug.traceback())
					MPART = "ERROR!"
				end
			end
		end
	end
end

The new function will return nil on both player and character variables if the thing that has touched this object isn't a player. Like for instance a bullet fired from a gun is not a player etc...

Hope this helps!