Can't generate tilemaps with heightmaps

[Texan Doom Guy]

everything works but heightmaps.

I'm getting the error:
res://addons/gaea/generators/2D/heightmap_generator/heightmap_generator_2d.gd:25 - Invalid set index 'seed' (on base: 'Nil') with value of type 'int'.

I made a recreation of my issue, with a HeightmapGenerator2D and a WalkerGenerator. They both have the same tilemap settings and TilemapGaeaRenderer.

Am I doing something wrong? There's no documentation for heightmaps so I used the same setup used in the getting started tutorial.

project showcasing my issue:
gewrwertgtwegr.zip

[BenjaTK]

Was this fixed? Do you still need help?

[Texan Doom Guy]

Yeah, I fixed it. I just didn't have a terrain in my tilemap