If you're testing these things with an add-on aircraft and it doesn't work, then it is always good to verify with an aircraft like the default Cessna 172 or Baron 58.
Like Sling said, often add-on aircraft have their own datarefs and/or commands.

It doesn't, not sure why it should?

You can first give it a try with the firewall turned off. And maybe trying to run X-Plane as administrator, but I don't know if that should make a difference.

That has nothing to do with our server
What does the content say?

People who have no idea, like me, won't understand why the screen stays black. On the iPad a panel script doesn't work, so there it always shows. So maybe it has to be turned into a setting?

Is it possible to make it work with a different dataref maybe? Because if you don't have that dataref, the screen will remain black.

You would probably need to use their custom events.

It's the one that was submitted to us. Can you send me your latest version?

I don't think that a fancy seat will be expensive when you get it from a car breaker.

Correction, the problem is in the panel Lua. You're using the dataref Z2DXP/EFB/ext2dxpefb/show_z2dxp_efb which does not exist anymore. Other issues: - Font boeing-style.ttf not found, because the actual file name is BOEING-style.ttf - Font futrw.ttf not found, because the actual file name is FUTRFW...