I'm getting a crash when starting up a new world.

"The mod Actual Underground Pipes (0.1.14) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event the-one-mod-with-underground-bits::on_player_controller_changed (ID 58)
the-one-mod-with-underground-bits/control.lua:18: attempt to index field '?' (a nil value)
stack traceback:
the-one-mod-with-underground-bits/control.lua:18: in function <the-one-mod-with-underground-bits/control.lua:11>"

I'm running these mods as well:
Elevated Rails
Quality
Space Age
Cheaper Gears
Cheaper Underground Belts
Disco Science
Easy Quality
Factorio Library
Factory organizer
Fast Rboto Start
FNEI
Inventory Repair
Mining Patch Planner
No Power Icons
Rail Signal Planner
Rebalanced Solar Energy and Laser Turrets
Red Belt Gear Reduction
Show Max Underground Distance
Stack Size
Trash Slot
VehicleSnap
Waterfill

I originally tried this on an existing world and got that same error message when opening Remote View.

Here is the save for that world: https://drive.google.com/file/d/1AjTGkK64JVmzv3RXB4Y-yt5t8DSUvo6a/view?usp=sharing

Can you tell me the exact steps done to reproduce this bug? I keep getting reports of it but can't seem to replicate it on my end

I got the same crash when tried to run editor.
Easy to reproduce.
1. Enable only stock mods and AUP.
2. Start new lab world with ctrl+left click on New game
3. Try to start editor with '/editor' console command (twice :)
4. Here it is:
The mod Actual Underground Pipes (0.1.14) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event the-one-mod-with-underground-bits::on_player_controller_changed (ID 58)
the-one-mod-with-underground-bits/control.lua:18: attempt to index field '?' (a nil value)
stack traceback:
the-one-mod-with-underground-bits/control.lua:18: in function <the-one-mod-with-underground-bits/control.lua:11>

Update: Crashes even without Space Age, only base+AUP required to reproduce.

Fixed in latest release i think, let me know if either of the bugs reappear

Crash on editor start is fixed.

But I hit new one. Steps 1-3 from my previous message was succesful. After editor started I tried to build pipe from the editor entities menu.
Got this one:
The mod Actual Underground Pipes (0.1.16) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event the-one-mod-with-underground-bits::on_built_entity (ID 6)
the-one-mod-with-underground-bits/control.lua:220: attempt to index field '?' (a nil value)
stack traceback:
the-one-mod-with-underground-bits/control.lua:220: in function <the-one-mod-with-underground-bits/control.lua:191>

It might be minor issue because it works when pipe built from players inventory.

Should be fixed in the latest release, let me know if it happens again.