1.18.2 forge
aquaculture 2.3.12

As you can see below, it is having trouble loading the loot tables in the muddy river biome. When this happens, it fishes up nothing. Probably has problems with other biomes from the mod as well.

Maybe just add a bypass to roll a default loot table if it doesn't recognize the biome? Sadly going to have to remove the mod from my pack for now because of this, I already tried to work around it by replacing the loot table with lootjs, but the bug seems to break the catch before it actually rolls for the loot :(

[19:25:46] [Server thread/ERROR] [aquaculture/]: Loot was empty in Biome: regions_unexplored:muddy_river. Please report on Github
[19:25:54] [Server thread/ERROR] [aquaculture/]: Loot was empty in Biome: regions_unexplored:muddy_river. Please report on Github

That's a problem on their end, as they haven't added their biomes to the Biome Dictionary.