Mouse is nil. Need help with a proper algorithm for this. Help?

Interaction method, when you mouse over something, a function is fired. Having trouble with the mouse being nil.

Problem: Players.Player1.PlayerGui.LocalPlayerScripts.Interaction:276: attempt to index field 'Target' (a nil value)

Problematic code section:

--mouse and functions already defined in another part of the script.
--MouseOver Interact item
local Interact = pcall(mouse.Target.Changed:connect(function()
    if mouse.Target then
        if mouse.Target.Name == "Prop" then
            HelpBarOpen("Press 'E' to morph into this prop.")
        else
            HelpBarClose()
        end

        if mouse.Target.Parent:FindFirstChild("Active") then
            HelpBarOpen("Press 'E' to interact with this" ..mouse.Target.Parent.Name".")
        elseif mouse.Target.Parent.Parent:FindFirstChild("Active") then
            HelpBarOpen("Press 'E' to interact with this" ..mouse.Target.Parent.Parent.Name".")
        else
            HelpBarClose()
        end
    end
end))