The latest documentation for PlanetsLib describes how to enable optional surface conditions like temperature and oxygen. Muluna enables oxygen, and Cerys enables temperature. You will need to enable them within this mod to prevent the mod from crashing when these mods are not installed.

https://github.com/danielmartin0/PlanetsLib/blob/5cd395f1a67641f91bae232ecb446ed60102a30c/README.md

Isn't that how it works now?

I saw what needed to be fixed. In the next release, I will try to add data.raw["bool-setting"]["PlanetsLib-enable-[PROPERTY]"].forced_value = true
I also saw new parameters.:
Atmospheric Gases
oxygen: n%
nitrogen: n%
carbon-dioxide: n%
argon: n%

All of them, if possible, will be added to the planets.
Thanks for the information.

If you have the opportunity. Write the names of the planets that need these parameters.

In the next version, parameters for planets will be added, namely Oxygen, Carbon-dioxide, Argon. The Nitrogen parameter does not work due to an error in the PlanetLib code.

The mod has been updated. Please check the changes.