Cities XXL Click on trade button crashes the game

Hey, this is really annoying. Whenever I click on the trade button, the game crashes. It does not matter if I click in the main menu or within a city menu. Any ideas?

Here's the log (last lines):
[12:59:58] CORE mcFile.cpp ( 198) Error can't open file ""
[13:00:01] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:01] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:01] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:01] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:01] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:01] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:02] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:02] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:02] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:06] LUA csScriptManager.cpp ( 523) Error PanelMgr:ClearAll calls PanelMgr:ClearMainMenu
[13:00:23] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:23] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:23] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:23] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:28] DISPLAYSCENE dsSceneUtils.cpp ( 100) Error dsSceneUtils::s_LoadGraphicObject: missing file <Data/Gfx/Furnitures/monty/f_mty_emptypot02.sgbin> and no placeholder found !
[13:00:28] DISPLAYSCENE dsSceneUtils.cpp ( 100) Error dsSceneUtils::s_LoadGraphicObject: missing file <Data/Gfx/Furnitures/monty/f_mty_emptypot02.sgbin> and no placeholder found !
[13:00:28] DISPLAYSCENE dsSceneUtils.cpp ( 100) Error dsSceneUtils::s_LoadGraphicObject: missing file <Data/Gfx/Furnitures/monty/f_mty_emptypot02.sgbin> and no placeholder found !
[13:00:28] DISPLAYSCENE dsSceneUtils.cpp ( 100) Error dsSceneUtils::s_LoadGraphicObject: missing file <Data/Gfx/Furnitures/monty/f_mty_emptypot02.sgbin> and no placeholder found !
[13:00:28] DISPLAYSCENE dsSceneUtils.cpp ( 100) Error dsSceneUtils::s_LoadGraphicObject: missing file <Data/Gfx/Furnitures/monty/f_mty_emptypot02.sgbin> and no placeholder found !
[13:00:31] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:39] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:00:48] LUA csScriptManager.cpp ( 523) Error LayerScript:ClearAll() called
[13:01:01] LUA csScriptManager.cpp ( 523) Error In Push cities, ThisCityD = SoloSaveRegion8Map74
[13:01:01] SCRIPT csLuaState.cpp ( 346) ErrorBuild LUA_ERRRUN : runtime error ([string "data\interface\panels\solotrade\solotrade.lua"]:1055: attempt to concatenate local 'Name' (a nil value) stack traceback: [string "data\interface\panels\solotrade\solotrade.lua"]:1055: in function 'PushCities' [string "data\interface\panels\solotrade\solotrade.lua"]:919: in function 'Refresh' [string "data\interface\panels\solotrade\solotrade.lua"]:773: in function 'Open' [string "data\interface\panels\planet\planet.lua"]:3849: in function 'OnButtonPress' [string "PanelInfoCity:OnButtonPress( "ButtonTrade" )"]:1: in main chunk)

 

I found a solution for the problem:
I had an old 'solosaveregion' file that did not belong to any active city of mine. I did two things: I safely re-installed the game (there are threads on this topic - with Steam, it is quite easy ) and I also deleted this unnecessary file:

Where to find these files?
C:\Users\*inser your system name here*\AppData\Local\Focus Home Interactive\Cities XXL\live\offline\solo

How do you see that the file is corrupt? Well, in my case, I could not edit it with Notepad++


Here is the working city again: