Can't load in folia 1.20.2

[ddsb520]

Log
[18:34:29 INFO]: [FreedomChat] Enabling FreedomChat v1.5.1
[18:34:29 ERROR]: Error occurred while enabling FreedomChat v1.5.1 (Is it up to date?)
java.lang.NoClassDefFoundError: net/minecraft/core/IRegistryCustom
at ru.bk.oharass.freedomchat.FreedomChat.onEnable(FreedomChat.java:25) ~[FreedomChat-1.5.1.jar:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:281) ~[folia-api-1.20.2-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:189) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:104) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:507) ~[folia-api-1.20.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.v1_20_R2.CraftServer.enablePlugin(CraftServer.java:652) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at org.bukkit.craftbukkit.v1_20_R2.CraftServer.enablePlugins(CraftServer.java:563) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:670) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:452) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:308) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1173) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:343) ~[folia-1.20.2.jar:git-Folia-"1e5e215"]
at java.lang.Thread.run(Unknown Source) ~[?:?]
Caused by: java.lang.ClassNotFoundException: net.minecraft.core.IRegistryCustom
at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:197) ~[folia-api-1.20.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:164) ~[folia-api-1.20.2-R0.1-SNAPSHOT.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
... 13 more
[18:34:29 INFO]: [FreedomChat] Disabling FreedomChat v1.5.1
Freedom Chat Version
1.5.1

[e-im]

You're using Mojang mapped Folia. This will cause any plugin expecting spigot mappings not to work.

While Mojang mappings at runtime are the future for Paper, for the moment you are mostly on your own running them and expected to be an advanced user.

If you did not intend to run Mojang mappings, you failed while compiling Folia. Use the Folia jar produced with a -reobf suffix.

If you intended to use Mojang mappings, then you will need to compile FreedomChat yourself and use the FreedomChat jar suffixed with -dev-all.jar.