Factorio Forums

I've tried a couple of mods a while ago, didn't like them and deleted/removed them. Flash forward to three weeks of no factorio, I try to play with the new version 0.11.2 and it doesn't work. I download/re-download 0.11.2 three times and it still gives me the following error:
"...mes/factorio/factorio.app/Contents/data/trailer|data.lua:151:attempt to index field 'created_effect' (a nil value)" (I'm using a mac btw)

What's am I doing wrong and what should/can I do?

This looks like a bug in our trailer mod, we didn't update it to 0.11.
You can find the mod-list.json and disable the trailer mod there.

The mod list should be in ~/Library/Application\ Support/factorio/mods/mod-list.json, open that file in text editor, find "trailer", and change its "enabled" field from "true" to "false". Then your game should start without problems.