Hi,
still crashing when pasting blueprint. I did upgrade to newest version
I do have Cybersyn Combinator loaded and Project Cybersyn - Logistics Train Dispatcher
plus all 3 LTN mods.

The blue print I am pasting does not contain any of the mods

The mod LTN Combinator Modernized (2.2.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event LTN_Combinator_Modernized::on_pre_build (ID 9)
LuaItemStack API call when LuaItemStack was invalid for read.
stack traceback:
[C]: in function 'get_blueprint_entities'
LTN_Combinator_Modernized/script/ltn_combinator.lua:2018: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

Same error on pasting blueprint without any LTN entities on version 2.2.1

Can reproduce as well. It's happening with blueprints from the library. Working on it now.

Short-term workaround is to copy the BP to your inventory.

Thanks for the report!

thank you for the quick response and also for the port of the mod