[Plus EMU] Major Thread Errors

[Receiver]

Hello RageZone,
When i get this thread error many things happen which are.
Rooms unload, get glitchy, and makes users disconnect.
Does anyone know how to get this 1 thread error fixed i would thank for it and give a like.

Error in thread RoomManager.OnCycle Exception --> Not inclusive:
System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at System.Collections.Generic.List`1.Enumerator.MoveNext()
at Silverwave.HabboHotel.Rooms.RoomManager.UnloadRoom(Room Room) in c:\Users\Administrator\Desktop\Emulator [L]\Plus Emulator\HabboHotel\Rooms\RoomManager.cs:line 638
at Silverwave.HabboHotel.Rooms.RoomManager.RemoveTask() in c:\Users\Administrator\Desktop\Emulator [L]\Plus Emulator\HabboHotel\Rooms\RoomManager.cs:line 543
at Silverwave.HabboHotel.Rooms.RoomManager.OnCycle() in c:\Users\Administrator\Desktop\Emulator [L]\Plus Emulator\HabboHotel\Rooms\RoomManager.cs:line 303

Any suggestions?

[MentaL]