V2 pack conversion error

[typiquement63]

Hello guys,
I am struggling to convert a newly created pack
I have checked the pack structure is fine

when I am trying to convert it into a FS V2 format, I am getting the below error

failed to convert pack in library Error: Internal Server Error: {"error":{"code":500,"message":"Failed to convert ARCHIVE format pack to FS format"},"stack":["studio.webui.service.LibraryService.addConvertedFsPackFile(LibraryService.java:274)","studio.webui.service.LibraryService.addConvertedPack(LibraryService.java:154)","studio.webui.api.LibraryController.lambda$apiRouter$4(LibraryController.java:92)","io.vertx.core.impl.ContextImpl.lambda$null$0(ContextImpl.java:159)","io.vertx.core.impl.AbstractContext.dispatch(AbstractContext.java:100)","io.vertx.core.impl.ContextImpl.lambda$executeBlocking$1(ContextImpl.java:157)","io.vertx.core.impl.TaskQueue.run(TaskQueue.java:76)","java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)","java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)","io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)","java.base/java.lang.Thread.run(Unknown Source)"]}

I am using windows and my java version is the below
java version "11.0.28" 2025-07-15 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.28+12-LTS-279)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.28+12-LTS-279, mixed mode)

Would you have any idea please?

Thanks

[typiquement63]

FYI it seems my audio file was too big