The mod BETA Factorio and Conquer: Tiberian Dawn (0.1.13) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Factorio-Tiberium-Beta::on_configuration_changed
Factorio-Tiberium-Beta/control.lua:136: attempt to index global 'data' (a nil value)
stack traceback:
Factorio-Tiberium-Beta/control.lua:136: in function 'upgradingToVersion'
Factorio-Tiberium-Beta/control.lua:90: in function <Factorio-Tiberium-Beta/control.lua:89>

Is what happens when i load up a previous save

Hi dogigy, that bug was fixed in version 1.0.1
I would recommend switching to the main version of the mod, since there is currently no new content being tested on the beta version of the mod. And also /tibRebuildLists after converting the save from the beta mod to the main mod.

How do i make use of /tibRebuildLists ?

EDIT: Nevermind i was able to just reload with the main mod without problems!

Thanks for your help