LOS doesn't affect module maps

[Jets]

I've recently switched over FGU to enjoy the LOS effect, also it's faster for my players to run around the map. I have one problem tho, after watching the official yt tutorial about LOS and how to make walls and stuff, mine doesn't work. I followed the steps, open a map, create a LOS layer, draw some walls, go into the combat tracker and put some PCs to test it and nothing happens.

I've checked the SmiteWorks maps and they work fine, the editing and testing, but I can't recreate that in SKT (d&d 5e)maps. Is this a bug or am I missing something?

[LordEntrails]

MOD: moved to FGU forum.

Can you let us know version, ruleset and extensions? And then please include screen shots so we can help diagnose. Thanks!

[Zacchaeus]

SKT already has LoS (I'm probably misunderstanding what you are saying above).

Also, you say create a LoS layer? You don't need to do that. You just open the map and draw the LoS on it.

[Jets]

Here's some screenshots. I'm using the 4.0.0 version.
https://i.imgur.com/BlIJTGu.png https://i.imgur.com/pILA7rD.png

[Moon Wizard]

You need to click the "eye" icon in the first image in order to turn on LoS on the map. By default, LoS is off, so that you as the GM can view the map unobscured.

Regards,
JPG