Describe the problem

For years I have used slashin to invite alts\static chacters
So
/in 1 /inv bob
/in 2 /inv tom

That has stopped working since the 10.2 patch. Now it seems pretty much all /in commands don't process. If I use just /in by self I get the generic how to use text. But it seems no sub command is working

What steps will reproduce the problem?

1. Uninstalled add-on to include deleted save variables
2. Reinstalle

Consider attaching a screenshot below to help describe your issue (Attach directly, do not link to other websites)

What version of the addon are you using? (Stating 'latest' is not useful)

10.2.0 (2023-11-08)

Do you have an error log of what happened?

When I enable Display Lau errors I do get the below error. This is using the example command of /in 1.5 /emote rocks

Message: Interface/AddOns/SlashIn/SlashIn.lua:14: attempt to index upvalue 'MacroEditBox' (a nil value)
Time: Sun Nov 19 11:11:57 2023
Count: 11
Stack: Interface/AddOns/SlashIn/SlashIn.lua:14: attempt to index upvalue 'MacroEditBox' (a nil value)
[string "@Interface/AddOns/SlashIn/SlashIn.lua"]:14: in function <Interface/AddOns/SlashIn/SlashIn.lua:13>
[string "@Interface/AddOns/SlashIn/SlashIn.lua"]:32: in function <Interface/AddOns/SlashIn/SlashIn.lua:32>

Locals: command = "/emote rocks"
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index upvalue 'MacroEditBox' (a nil value)"
MacroEditBox = nil
dummy = defined @Interface/AddOns/SlashIn/SlashIn.lua:12
print = defined @Interface/FrameXML/RestrictedInfrastructure.lua:124

Any additional information? (example: WoW language if not English)

Same -

Message: Interface/AddOns/SlashIn/SlashIn.lua:14: attempt to index upvalue 'MacroEditBox' (a nil value)
Time: Tue Dec 26 11:50:18 2023
Count: 17
Stack: Interface/AddOns/SlashIn/SlashIn.lua:14: attempt to index upvalue 'MacroEditBox' (a nil value)
[string "@Interface/AddOns/SlashIn/SlashIn.lua"]:14: in function <Interface/AddOns/SlashIn/SlashIn.lua:13>
[string "@Interface/AddOns/SlashIn/SlashIn.lua"]:32: in function <Interface/AddOns/SlashIn/SlashIn.lua:32>

Locals: command = "/run EjectPassengerFromSeat(1)"
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index upvalue 'MacroEditBox' (a nil value)"
MacroEditBox = nil
dummy = defined @Interface/AddOns/SlashIn/SlashIn.lua:12
print = defined @Interface/FrameXML/RestrictedInfrastructure.lua:124