Hello, I came across this error java.lang.IllegalArgumentException: n must be positive
at com.badlogic.gdx.math.RandomXS128.nextLong(RandomXS128.java:110) ~[desktop-1.0.jar:?]
at com.badlogic.gdx.math.RandomXS128.nextInt(RandomXS128.java:99) ~[desktop-1.0.jar:?]
at com.megacrit.cardcrawl.random.Random.random(Random.java:65) ~[desktop-1.0.jar:?]
at com.megacrit.cardcrawl.cards.CardGroup.getRandomCard(CardGroup.java:561) ~[?:?]
at com.megacrit.cardcrawl.dungeons.AbstractDungeon.getCard(AbstractDungeon.java:1872) ~[?:?]
at com.megacrit.cardcrawl.dungeons.AbstractDungeon.getRewardCards(AbstractDungeon.java:1824) ~[?:?]
at com.megacrit.cardcrawl.rewards.RewardItem.<init>(RewardItem.java:161) ~[?:?]
at com.megacrit.cardcrawl.screens.CombatRewardScreen.setupItemReward(CombatRewardScreen.java:89) ~[?:?]
at com.megacrit.cardcrawl.screens.CombatRewardScreen.open(CombatRewardScreen.java:370) ~[?:?]
at com.megacrit.cardcrawl.rooms.AbstractRoom.update(AbstractRoom.java:437) ~[?:?]
at com.megacrit.cardcrawl.dungeons.AbstractDungeon.update(AbstractDungeon.java:2512) ~[?:?]
at com.megacrit.cardcrawl.core.CardCrawlGame.update(CardCrawlGame.java:879) ~[?:?]
at com.megacrit.cardcrawl.core.CardCrawlGame.render(CardCrawlGame.java:427) [?:?]
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:225) [?:?]
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:126) [desktop-1.0.jar:?] as I'm trying to develop a mod.

ModVersion Info:
- Java version (1.8.0_144)
- Slay the Spire (01-27-2020)
- ModTheSpire (3.16.0)

Do you know what could cause such problems ?