pressing crtl-r on a newly built roboport produced the following error:

152.337 Error MainLoop.cpp:1195: Exception at tick 80966: The mod Renamer caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Renamer::rename (ID 197)
Unknown style titlebar_flow
stack traceback:
    __Renamer__/control.lua:98: in function 'SpawnGUI'
    __Renamer__/control.lua:20: in function <__Renamer__/control.lua:11>
stack traceback:
    [C]: in function 'add'
    __Renamer__/control.lua:98: in function 'SpawnGUI'
    __Renamer__/control.lua:20: in function <__Renamer__/control.lua:11>