How do you unlock the wanderer's cup?

[Running Rat]

Apparently, the wanderer's cup is the most challenging arena cup in the game. However, I can't figure out how to unlock it. I have beaten the game, including the DLC. I unlocked the ancient cups. But the wanderer's cup is still locked. I tried looking it up, but all I found was strategies for defeating it after it's already unlocked.

[mapron]

I maybe wrong but you need to finish DLC + beat the monkey boss on a beach. I also have it unlocked but I forgot when it happened (I remember message box appeared after one of the fights)

[mapron]

According to json file contents, it has this condition:

"condition":"(quest.rhg-4-maritime_smuggle_2.solved && quest.bg-3-goat_final.solved && quest.jungleGreens-3-escort_2.solved && quest.tremor-1.solved && quest.ape-battle.solved) || test",

(steamapps\common\CrossCode\assets\extension\post-game\data\arena\faction-cup-3.json).

You can got some hints which quests need to be solved to order to unlock this (or dig more in json files to find what "quest.jungleGreens-3-escort_2" and so on means)