Crashed clicking "Back" from initial dupe screen

[broken cargo]

seems like you know what mod caused this, so im not sure what help you're anticipating?

looks like the planning tool, however fast track was somehow involved (which is why i never touch performance mods like that, they touch.. too much), so id say either planning tool has an issue or it doesnt cooperate with fast track

both are easy to test by disabling fast track and seeing if it still happens