LOS does not fucntion

[Jimlock]

Hello,
I bought a DD5 module (Tomb of Annihilation), but LOS do not function.
Should I uninstall/reinstall the module ? And how ?
Thanks for help.

[Zacchaeus]

THis is working for me. Can you provide more detailas. Is there no line of sight on any map or just some maps (Not every map has Line of sight on it). Can you provide a screenshot of a map where this isn't functioning?