Didn't crash game, but did freeze game for a few seconds, blame gave this info:

[13Jan2021 00:08:16.402] [Server thread/ERROR] [com.telepathicgrunt.blame.Blame/]:
****************** Blame Report 1.8.0 ******************

Found a Loot Table path that does not exist: upgrade_aquatic:injections/pickerelweed_fishjunk
The path represented by this Loot Table is: data/upgrade_aquatic/loot_tables/injections/pickerelweed_fishjunk.json
Loot Table method called at: net.minecraft.loot.LootContext$Builder$$Lambda$37500/1167059784.apply
net.minecraft.loot.LootContext.func_227502_a_
Most common cause is that the Loot Table file is not actually at that location.
Please let the mod author know about this so they can check to see if their Loot Table is correct.