Error while running event Telogistics::on_gui_opened (ID 102)
Unknown virtual-signal name: signal-retreat-size
stack traceback:
[C]: in function 'add'
Telogistics/control.lua:892: in function 'setup_custom_teleporter_gui'
Telogistics/control.lua:788: in function <Telogistics/control.lua:776>

This used to be a valid signal and now it isn't. Either you removed a mod, or some other mod updated and got rid of the signal.

Anyway, you can get around this by mining the teleporter and putting it back.