The mod AAI Signal Transmission (0.4.9) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event aai-signal-transmission::on_robot_built_entity (ID 14)
The mod Subsurface - build beneath your base! (1.0.8) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Subsurface::on_surface_created (ID 63)
Subsurface/scripts/resources.lua:22: bad argument #1 of 3 to 'setmetatable' (table expected, got nil)
stack traceback:
[C]: in function 'setmetatable'
Subsurface/scripts/resources.lua:22: in function 'manipulate_autoplace_controls'
Subsurface/scripts/resources.lua:81: in function <Subsurface/scripts/resources.lua:79>
stack traceback:
[C]: in function 'create_surface'
aai-signal-transmission/control.lua:428: in function 'get_surface'
aai-signal-transmission/control.lua:66: in function 'register_transceiver'
aai-signal-transmission/control.lua:57: in function <aai-signal-transmission/control.lua:44>

Fixed for the next release. Until that, you can insert the following line in scripts/resources.lua after line 21:
if not mgs or not mgs.autoplace_controls then return end

Alright thanks c: