Loot tables not working

So i am having problems with making random loot tables and i was wondering how to fix it...so the registry name is chests/g_b and the name for the mod is worksmp1 and for some reason when i do this command which multiple people told me to do it didnt work...Any help? Thanks.

/give @s chest{BlockEntityTag:{LootTable:"Worksmp1:chests/g_b"}}