Using Loom's runServer gradle tasks throws a runtime exception

[TheLimeGlass]

 java.lang.RuntimeException: Error creating Mixin config adventure-platform-fabric.client.mixins.json for mod adventure-platform-fabric
        at net.fabricmc.loader.impl.launch.FabricMixinBootstrap.init(FabricMixinBootstrap.java:95) ~[fabric-loader-0.14.24.jar:?]
        at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:151) ~[fabric-loader-0.14.24.jar:?]
        at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68) ~[fabric-loader-0.14.24.jar:?]
        at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) ~[fabric-loader-0.14.24.jar:?]
        at net.fabricmc.devlaunchinjector.Main.main(Main.java:86) ~[?:?]
Caused by: org.spongepowered.asm.launch.MixinInitialisationError: Error initialising mixin config adventure-platform-fabric.client.mixins.json
        at org.spongepowered.asm.mixin.transformer.Config.create(Config.java:153) ~[sponge-mixin-0.12.5+mixin.0.8.5.jar:0.12.5+mixin.0.8.5]
        at org.spongepowered.asm.mixin.Mixins.createConfiguration(Mixins.java:100) ~[sponge-mixin-0.12.5+mixin.0.8.5.jar:0.12.5+mixin.0.8.5]
        at org.spongepowered.asm.mixin.Mixins.addConfiguration(Mixins.java:87) ~[sponge-mixin-0.12.5+mixin.0.8.5.jar:0.12.5+mixin.0.8.5]
        at net.fabricmc.loader.impl.launch.FabricMixinBootstrap.init(FabricMixinBootstrap.java:93) ~[fabric-loader-0.14.24.jar:?]
        ... 4 more
Caused by: java.lang.IllegalArgumentException: The specified resource 'adventure-platform-fabric.client.mixins.json' was invalid or could not be read
        at org.spongepowered.asm.mixin.transformer.MixinConfig.create(MixinConfig.java:1290) ~[sponge-mixin-0.12.5+mixin.0.8.5.jar:0.12.5+mixin.0.8.5]
        at org.spongepowered.asm.mixin.transformer.Config.create(Config.java:148) ~[sponge-mixin-0.12.5+mixin.0.8.5.jar:0.12.5+mixin.0.8.5]
        at org.spongepowered.asm.mixin.Mixins.createConfiguration(Mixins.java:100) ~[sponge-mixin-0.12.5+mixin.0.8.5.jar:0.12.5+mixin.0.8.5]
        at org.spongepowered.asm.mixin.Mixins.addConfiguration(Mixins.java:87) ~[sponge-mixin-0.12.5+mixin.0.8.5.jar:0.12.5+mixin.0.8.5]
        at net.fabricmc.loader.impl.launch.FabricMixinBootstrap.init(FabricMixinBootstrap.java:93) ~[fabric-loader-0.14.24.jar:?]
        ... 4 more

Using Fabric Adventure 5.9.0 and 1.20.1 MC (I need 1.20.1)

Using Loom's gradlew clean runServer instantly throws this issue.

My guess is because Adventure is expecting it to be like a traditional jar, where the Loom run tasks don't build a jar.

[zml2008]

Fixed in acac5bb, will be in 5.10.1.