Using: AE2WTLib-9.0.0-beta.3 and appliedenergistics2-9.0.0-alpha.6
Unable to link any of the terminals via the security terminal. Able to link wireless terminal provided by AE2, but tried crafting, pattern, universal, none will link.
No crashes involved.

I think ae2 changed something about how the security terminal works in alpha.6, so it broke
you should be able to link it manually by editing the nbt of a dropped item entity

I will look into this, hopefully I can provide a proper fix today

I tried this, they link just fine, the tooltip is just broken

I fixed the tooltip in dev.
I won't make a release just for a visual fix, but in the next release it should display correctly

okay I think I found the bug.
It is technically an ae2 bug?
I hope I can fix this

So I was able to finally fix this.
It maybe wasn't even an ae2 bug but rather Environment(EnvType.CLIENT) maybe not working properly with reflection.
The fix was quite easy in the end.

I will make a new release soon.

Even if the tooltip is incorrect saying it's not linked, but actually is, then shouldn't the terminal still open to my system? Currently it doesn't open.

does anything appear in the chat or log when you try to open a terminal?

If I disconnect the security terminal, it says "Station can not be located. If the terminal is attached, nothing happens, no message.

So it looks like it is actually linked, but something else fails...

I can't even figure out where it could go wrong and not open the terminal without telling anything...
my best guess would be a mod conflict

could you maybe upload a debug crashlog? (hold F3+C for 10 seconds)

crash-2021-10-22_13.41.57-client.txt

great.
I can now reproduce this bug
it does only happen on servers

and from the error in the server console, it looks like I am calling some client only classes (again)

Interestingly it is only the crafting terminal I can't use, the others work fine