started on lignumis, can't progress. the tree types the tech tree wants me to harvest aren't appearing. factoriopedia says they don't appear on lignumis.

stringfond only appearing on: nekohaven, tapatrion, zzhora, nauflglebunsilo, gleba, terra palus. can't research agriculture without harvesting it.

Remove nekohaven, tapatrion, zzhora (basically all mods from that author). They don't add anything to the game and are not being developed currently.

Otherwise it just seem an incompatibility with a mod. If you can provide me a savegame, I can have a look.

Ah, it's probably this https://mods.factorio.com/mod/fluroflux

I'll make it compatible.

I don't see an incompatibility with Fluroflux or Terra Palus. If you are still having this problem, please send me a savegame.