Idk why this error is occurring, my assumption is the Tiberium mod might of renamed it.

Failed to load mods: PlanetsLib/lib/planet.lua:175: PlanetsLib:update() - planet not found: tiber
stack traceback:
[C]: in function 'error'
PlanetsLib/lib/planet.lua:175: in function 'verify_update_fields'
PlanetsLib/lib/planet.lua:82: in function 'update'
PlanetsLib/api.lua:61: in function 'update'
interstellar-travel/compat/twelpa/Factorio-Tiberium.lua:6: in main chunk
[C]: in function 'require'
interstellar-travel/data-updates.lua:275: in main chunk

Mods to be disabled:
• interstellar-travel (1.0.10)

I am not able to reproduce this issue. Can you please try to provide a minimal list of mods that causes the issue for you?

Factorio 2.0.60
Elevated Rails 2.0.60
Quality 2.0.60
Space Age 2.0.60
Tiberium Dawn 1.012
Factorio Library 0.16.3
Interstellar Travel 1.0.10
PlanetsLib 1.11.1

Can you link the Tiberium Dawn and Factorio Library (nevermind, found this one) mods? I cannot find either of them. Factorio and Conquer: Tiberian Dawn/Factorio-Tiberium is on version 2.0.12 which is completely different than what you provided and seems to be a different mod.

https://mods.factorio.com/mod/Factorio-Tiberium
This is the one i use.

I just realized what you were talking about before, I did typo the Tiberium Dawn version. it's 2.0.12

I am getting the same error when enabling Nauvis has Only Tiberium option, which appears to make Tiber unavailable, causing Interstaller Travel to return this error.