Installation problems

MarketPlace.onEnable can disable the plugin before any listings exist. Three real causes.

1. Not Paper 26.2

GrzybcioRynek działa TYLKO na Paper 26.2!
Wykryta wersja: minecraft=..., bukkit=..., server=...

Check: isSupportedServerVersion() — token 26.2 (exact, with separator). 26.20 / 1.21.x fail. api-version: '26.2' in plugin.yml matches this hard check.

What to do: run Paper 26.2. The plugin supports no other versions.

2. Missing Vault

First attempt:

Vault nie znaleziono! Plugin nie będzie działać.
Economy jeszcze niedostępna — ponawiam za 1s (Essentials/Vault)...

After 20 ticks, still wrong:

Vault nie znaleziono lub brak providera ekonomii! Wyłączanie pluginu.

Vault is depend. The Vault JAR must be in plugins/.

3. Vault present, economy missing

Nie znaleziono providera ekonomii!

Vault alone is not enough. You need a plugin registering Economy (e.g. EssentialsX Economy). Soft-depend Essentials exists only so late-load can finish before the retry.

JAR and Java

Build JAR: Developer → Build (JDK 25, gradle jar in PLugin/). Artifact: GrzybcioRynek-1.0.3.jar. Admin installs the ready file — Installation.

Wrong JAR / wrong Java on the server shows as a class file / toolchain error — not a separate plugin message.

After successful start

GrzybcioRynek został włączony!
Załadowano <n> aktywnych ofert.

Optionally: Zarejestrowano placeholdery PlaceholderAPI.

Shutdown:

GrzybcioRynek został wyłączony!

(onDisable saves listings.yml and market-data.yml.)