I did not change anything about the fort protection from heat for any nation, and i just downloaded the mod and played as EA abysia and I still had 0 population death in forts (at least from heat)

For nations with 2 levels of temperature resistance (like EA abysia) this mod does not place any temperature resistance sites in provinces with forts (and will remove them after 1 turn if a fort is built) because if it didn't it would actually stack growth.

EA Abysia often loses population for a variety of other reasons, you can click on the population tab: For instance it often starts in a normal cave province (-0.4% population) or in a waste or Crystal Cave province, (-0.6% population) so you might be seeing population death from the terrain type?

Something is a bit wonky with the mod. It seems to remove the protection from forts as well. In EA abysia, my population is decreasing due to the heat scales in the capital.

ugh every time you update the mod it erases the description ill put it back

Description?