Global Chat Window not working

Hello, i got a problem with chat window. When i /join global and click with right mouse button and "move to a new window", the window is created but in this window there are no global messages and i still see that mess in my General chat window. In addition, this Lua Error shows up: (Did anyone face such problem before?)

Message: Interface\FrameXML\FloatingChatFrame.lua:110: attempt to index local 'copyFrom' (a nil value)
Time: 01/31/19 11:35:57
Count: 1
Stack: Interface\FrameXML\FloatingChatFrame.lua:110: in function `FCF_CopyChatSettings'
Interface\FrameXML\ChatFrame.lua:4469: in function `func'
Interface\FrameXML\UIDropDownMenu.lua:583: in function `UIDropDownMenuButton_OnClick'
[string "*:OnClick"]:1: in function <[string "*:OnClick"]:1>

Locals: copyTo = ChatFrame3 {
0 = <userdata>
flashTimer = 0
isInitialized = 1
tellTimer = 9064.974
resizeButton = ChatFrame3ResizeButton {
}
buttonFrame = ChatFrame3ButtonFrame {
}
oldAlpha = 0.25
channelList = <table> {
}
clickAnywhereButton = ChatFrame3ClickAnywhereButton {
}
isDocked = 1
editBox = ChatFrame3EditBox {
}
hasBeenFaded = true
isLocked = 1
name = "Trade"
buttonSide = "left"
zoneChannelList = <table> {
}
defaultLanguage = "Common"
messageTypeList = <table> {
}
}
copyFrom = nil
(*temporary) = <function> defined @Interface\FrameXML\FloatingChatFrame.lua:92
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index local 'copyFrom' (a nil value)"