Failed to load mods: loaders-modernized/prototypes/loader/technology.lua:73: attempt to index field 'prerequisite_techs' (a nil value)
stack traceback:
loaders-modernized/prototypes/loader/technology.lua:73: in function 'update_or_create_technology'
loaders-modernized/prototypes/mdrn-loader.lua:75: in function 'add_loaders'
...rnized-integrations__/prototypes/5dim/5dim_transport.lua:189: in main chunk
[C]: in function 'require'
loaders-modernized-integrations/data.lua:1: in main chunk

Everything is fine when run together on regular 5dim, but I have to disable your mod when I try to launch with the recent 5dim Space Age release.

This looks like a bug in 5Dim New Transport.

Without Space age:
Mk1 items are unlocked by Logistics (logistics)
Mk2 items are unlocked by Logistics 2 (logistics-2)
...
Mk4 items are unlocked by Logistics 4 (logistics-4)
Mk5 items are unlocked by Logistics 5 (logistics-5)
...
MK10 items are unlocked by Logistics 10 (logistics-10)

With Space Age:
Mk1 items are unlocked by Logistics (logistics)
Mk2 items are unlocked by Logistics 2 (logistics-2)
...
Mk4 items are unlocked by Transport Belt Mk4 (tubo-transport-belt)
Mk5 items are unlocked by Logistics 4 (logistics-4)
...
MK10 items are unlocked by Logistics 9 (logistics-9)

Therefore Logistics 10 (logistics-10) doesn't exist and the technology is missing to attach the loaders.

I have submitted this to the 5 Dim issues page (https://github.com/McGuten/Factorio5DimMods/issues/181). I'll hold on this for now, pending their response. If they fix it, should be good to go after that. If the don't, I'll have to check into how to accommodate this, and if it makes sense.

Thanks for checking!
I'll keep an eye out for 5dim's update.