Custom loot tables are not working on realms.

I wanted to add loot tables to my realms server, but the server just keeps using the standard loot tables no matter what. Tried changing folder locations, downloading, reuploading... Nothing works.
In single player they work fine for me though.

The loot_tables folder is in the following directory:
/Users/Happyness/Library/Application Support/minecraft/saves/tables_test/data
Actual loot_tables folder with all .json files is attached.

Thank you for your help.