Everytime i click on a train game crashes and i get that message....unistall until fix it sad:-(
The mod TrainsSignalSender (0.4.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event TrainsSignalSender::on_gui_opened (ID 84)
Unknown style logistic_button_slot
stack traceback:
HermiosLibs/guiLibs.lua:154: in function 'addToGui'
HermiosLibs/guiLibs.lua:184: in function 'addToGui'
HermiosLibs/guiLibs.lua:178: in function 'addToGui'
HermiosLibs/guiLibs.lua:124: in function 'InitOpeningGui'
HermiosLibs/controlLib.lua:173: in function <HermiosLibs/controlLib.lua:148>
stack traceback:
[C]: in function 'add'
HermiosLibs/guiLibs.lua:154: in function 'addToGui'
HermiosLibs/guiLibs.lua:184: in function 'addToGui'
HermiosLibs/guiLibs.lua:178: in function 'addToGui'
HermiosLibs/guiLibs.lua:124: in function 'InitOpeningGui'
HermiosLibs/controlLib.lua:173: in function <HermiosLibs/controlLib.lua:148>

I've reported the same bug here already. There's also a description how to fix that somewhere in the thread. It worked for me at the time, so you should give that a try. (No guarantee it will work with Factorio 1.0 -- I've not had time to play for months…)