Hey Napu,
I had a bug before with mod, it had something to do with another mod having priority over this one, and that caused the solidified remains to not be craftable in the chem plant. I did find a work around for it though, at the cost of achievements.
Typing in /c game.player.force.technologies['compression-tech-2'].researched=false in the command bar will un-research the solidification tech. Researching it again should bring back the crafting option.
Not sure if this is just a problem I had though.