What is going on?

[Trishacastover]

Minecraft Logs

Incompatible mods found!
net.fabricmc.loader.impl.FormattedException: net.fabricmc.loader.impl.discovery.ModResolutionException: Mod discovery failed!
	at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:63)
	at net.fabricmc.loader.impl.FabricLoaderImpl.load(FabricLoaderImpl.java:204)
	at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:142)
	at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:66)
	at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at com.modrinth.theseus.MinecraftLaunch.relaunch(MinecraftLaunch.java:63)
	at com.modrinth.theseus.MinecraftLaunch.main(MinecraftLaunch.java:28)
Caused by: net.fabricmc.loader.impl.discovery.ModResolutionException: Mod discovery failed!
	at net.fabricmc.loader.impl.discovery.ModDiscoverer.lambda$discoverMods$1(ModDiscoverer.java:155)
	at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
	at net.fabricmc.loader.impl.discovery.ModDiscoverer.discoverMods(ModDiscoverer.java:155)
	at net.fabricmc.loader.impl.FabricLoaderImpl.setup(FabricLoaderImpl.java:222)
	at net.fabricmc.loader.impl.FabricLoaderImpl.load(FabricLoaderImpl.java:199)
	... 7 more
Caused by: net.fabricmc.loader.impl.metadata.ParseMetadataException: Error reading fabric.mod.json file for mod at C:\Users\Dream\AppData\Roaming\ModrinthApp\profiles\m\mods\RUExpansion-1.0.1+1.21.1.jar: List of people must be an array Error was located at:  at line 7 column 15 path $.authors
	at net.fabricmc.loader.impl.metadata.V1ModMetadataParser.readPeople(V1ModMetadataParser.java:480)
	at net.fabricmc.loader.impl.metadata.V1ModMetadataParser.parse(V1ModMetadataParser.java:184)
	at net.fabricmc.loader.impl.metadata.ModMetadataParser.readModMetadata(ModMetadataParser.java:141)
	at net.fabricmc.loader.impl.metadata.ModMetadataParser.readModMetadata(ModMetadataParser.java:104)
	at net.fabricmc.loader.impl.metadata.ModMetadataParser.parseMetadata(ModMetadataParser.java:44)
	at net.fabricmc.loader.impl.discovery.ModDiscoverer$ModScanTask.parseMetadata(ModDiscoverer.java:510)
	at net.fabricmc.loader.impl.discovery.ModDiscoverer$ModScanTask.computeJarFile(ModDiscoverer.java:332)
	at net.fabricmc.loader.impl.discovery.ModDiscoverer$ModScanTask.compute(ModDiscoverer.java:290)
	at net.fabricmc.loader.impl.discovery.ModDiscoverer$ModScanTask.compute(ModDiscoverer.java:249)
	at java.base/java.util.concurrent.RecursiveTask.exec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Description

I don't understand, I've been using these mods without issue for a while now, why are there suddenly problems?

[Poopooracoocoo]

It's a bug in https://modrinth.com/mod/regions-unexplored-expansion/version/5Wgh27UC. You can fix it yourself by opening the RUExpansion-1.0.1+1.21.1.jar file in 7-zip and editing the fabric.mod.json. Make the following changes to the author section. Then save it, close notepad, and agree to update the archive.

Old/current

Your edit

  "authors": [
        "DropoutGuy"
  ],

[Trishacastover]

Thank you very much! The only coding language I have a basic grasp of is HTML, so I had zero clue as to what I needed to do.