Permission denied on GCE repository

When installing packages using pacstrap, its failed. Here is the log,

```
2025-12-20 02:00:03 UTC job: gcp-image-arch: mkfs.fat 4.2 (2021-01-31)
2025-12-20 02:00:03 UTC job: gcp-image-arch: - Mounting the root partition.
2025-12-20 02:00:03 UTC job: gcp-image-arch: - Mounting the boot partition.
2025-12-20 02:00:03 UTC job: gcp-image-arch: - Copy the host pacman database caches
2025-12-20 02:00:03 UTC job: gcp-image-arch: - Installing Arch Linux.
2025-12-20 02:00:03 UTC job: gcp-image-arch: ==> Creating install root at /var/lib/karajo/job/gcp-image-arch/build-arch-gce.NSk/disk.mnt
2025-12-20 02:00:04 UTC job: gcp-image-arch: ==> Installing packages to /var/lib/karajo/job/gcp-image-arch/build-arch-gce.NSk/disk.mnt
2025-12-20 02:00:04 UTC job: gcp-image-arch: :: Synchronizing package databases...
2025-12-20 02:00:04 UTC job: gcp-image-arch: core downloading...
extra downloading...
build.kilabit.info downloading...
gce downloading...
error: failed retrieving file 'gce.db' from storage.googleapis.com : The requested URL returned error: 403
error: failed to synchronize all databases (failed to retrieve some files)
2025-12-20 02:00:04 UTC job: gcp-image-arch: ==> ERROR: Failed to install packages to new root
```

Is the repository changes? Does anyone know the alternative to install google-compute-engine for ArchLinux?