Getting the same error, but according to Metapad line 429 is..
"Name := Space Port
Description := Facility which processes all generated resources in its system and makes them available for the empire.
Facility Group := Resource Extraction
Facility Family := 7
Roman Numeral := 0
Restrictions := None
Pic Num := 7
Cost Minerals := 6000
Cost Organics := 0
Cost Radioactives := 0 <-- right here
Number of Tech Req := 1
Tech Area Req 1 := Cargo
Tech Level Req 1 := 1
Number of Abilities := 1
Ability 1 Type := Spaceport
Ability 1 Descr := Acts as a spaceport for this system.
Ability 1 Val 1 := 0
Ability 1 Val 2 := 0
Ability 2 Type := None"
also, tried loading Proportions data. no go, "required tech area greater than max tech area". That's intential in Proportions, but looks like your loader doesn't like the concept.
Phoenix-D