Converting Singeplayer world to Multiplayer dedicated host server No items/construction/cars convert

[royal ether]

I am trying to convert my singe player world into a multiplayer world. I have been following this guide
https://shockbyte.com/billing/knowledgebase/484
I copy and pasted all of the files from inside my singleplayer world save folder into my new multiplayer one
After launching the server I think I have converted parts of the map because the in game date is 9/10 which is the same as my singleplayer map I was even able to move my singeplayer character over by editing the players.db file, BUT all the cars have disappeared and any construction I had placed down is gone(my whole base)

[warm mountain]

Did you make sure to enable the exact same mods in the same order you had in your singleplayer game?