This is a known bug in the game. The rescue ship is not equipped with a Universal Dockport, only a cargo pod port. I assume at some point, Bineshi was intending to equip the escape pod with a cargo pod port so it could be docked to any freighter.
The easiest fix should be to go to the file in the mod folder directory:
unleashed_main_94/sims/ships/player/pinguin_jafs_recovery.ini
and change the entry:
template[1]=ini:/subsims/dockports/pinguin_port
to:
template[1]=ini:/subsims/dockports/universal_port
You could also change the dockport on the escape pod itself to be the same one a cargo pod has, however this may result in unintended behaviors when attempting to dock to things that are not jafs.
I-War 2 Discord: https://discord.gg/RWaabWB
Very little about the game is not known to me. Any questions you got, throw them at me. 🙂