Cannot add reactions to messages in forum threads

[ApoY2k]

General Troubleshooting

• I have checked for similar issues on the Issue-tracker.
• I have updated to the latest JDA version
• I have checked the branches or the maintainers' PRs for upcoming bug fixes.

Expected Behaviour

When adding reactions to forum thread messages, JDA should be able to add reactions to messages in form threads

Code Example for Reproduction Steps

suspend fun executeFavCommand(storage: Storage, event: SlashCommandInteractionEvent) {
    val interaction = event.reply("Fetching candidates...").await()
    val original = interaction.retrieveOriginal().await()
    original.addReaction("👍").await()
    original.addReaction("👎").await()
}

Code for JDABuilder or DefaultShardManagerBuilder used

val jda = JDABuilder.createDefault(env.authToken).build()

Exception or Error

java.lang.NullPointerException: Cannot invoke "net.dv8tion.jda.api.entities.GuildChannel.getPermissionContainer()" because "channel" is null
at net.dv8tion.jda.internal.entities.mixin.channel.middleman.GuildChannelMixin.hasPermission(GuildChannelMixin.java:48)
at net.dv8tion.jda.internal.entities.mixin.channel.middleman.GuildChannelMixin.checkPermission(GuildChannelMixin.java:51)
at net.dv8tion.jda.internal.entities.mixin.channel.middleman.GuildMessageChannelMixin.checkCanAccessChannel(GuildMessageChannelMixin.java:107)
at net.dv8tion.jda.internal.entities.mixin.channel.middleman.MessageChannelMixin.addReactionBy

[MinnDevelopment]

Forums are implemented by #2184, can you try with that instead?

[ApoY2k]

@MinnDevelopment Will give it a try, thanks for the hint

[MinnDevelopment]

Fixed in 5.0.0-alpha.20