The LTN output is telling you what is supposed to be on the train, so that you can compare it to what is actually on the train ("Read train contents" on the train stop itself, as in vanilla). So, when unloading, the output will be nothing: the train is supposed to be empty, so you should remove ...

When the train arrives at the unloading station and begins to unload, there is no corresponding type of cargo signal.
1706119498489.png
It can be seen that there is a signal when the goods are loaded.
1706119452877.png
I have thought about whether it does not have the signal when unloading, but ...

Sorry for not being explicit enough. Its like king said: you have to go through the tech tree to see which dependencies are still there and are probably disabled.
This is shown as a greyed out tech. We prefer if you could give us a screen shot of it. Since it might be a conflict with another ...

Clarifier cant work when deal with the H2,CO2.Clarifier has 1k fluid，but not work
When I deal with CO2 is stop,I dug it and placed it again it works fine,it will stop suddenly too.
But when I deal with H2, no matter what I do,it not work any more.
Base 0.18.18
Angel's mod latest version
thanks