Auto-filling chests with random loot from the loot table (loot from the mod)

Hi! I need your help, I've been struggling with the problem of creating chests with specific loot from a mod for two days. (That is, I want to open a chest ((ideally, it should also have a 4-minute stimer like Skyraces)) and receive a random weapon from the superbwarfare mod from the list that I specify) However, when I try to create such a table by launching Minecraft through mcreator and writing the command /data merge block ~ ~-2 ~ {LootTable:"(insert your name here)"} it says either an unexpected error has occurred, or it says that the item's coordinates have changed, but the drop in the chests remains the same. I also cannot connect the items from the mod, and when I try to launch Minecraft mcreator with the superbwarfare mod, it immediately closes Minecraft. Additionally, if I place all the files from my finished build (on the same version of Minecraft as the 1.20.1 project), it also closes Minecraft immediately after launch. Please help me, I don't know what to do anymore. I've tried so many things.