I am trying to restore a backup from a GCS bucket using the next API call: :8983/solr/admin/collections?action=RESTORE&repository=gcs&location=my-backup-folder/&name=collection_04022025&collection=collection&async=11405&wt=json

But I'm getting this error:

.apache.solrmon.SolrException: Couldn't restore since doesn't exist: my-backup-folder/collection_04022025/collection/
    at .apache.solr.core.backup.BackupManager.forRestore(BackupManager.java:131) ~[?:?]
    at .apache.solr.cloud.api.collections.RestoreCmd$RestoreContext.<init>(RestoreCmd.java:183) ~[?:?]
    at .apache.solr.cloud.api.collections.RestoreCmd$RestoreContext.<init>(RestoreCmd.java:143) ~[?:?]
    at .apache.solr.cloud.api.collections.RestoreCmd.call(RestoreCmd.java:98) ~[?:?]
    at .apache.solr.cloud.api.collections.OverseerCollectionMessageHandler.processMessage(OverseerCollectionMessageHandler.java:271) ~[?:?]
    at .apache.solr.cloud.OverseerTaskProcessor$Runner.run(OverseerTaskProcessor.java:524) ~[?:?]
    at .apache.solrmon.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:218) ~[?:?]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
    at java.lang.Thread.run(Thread.java:840) [?:?]

I am very sure that the folder exists in the bucket. I'm also sure that the service account attached to the Solr pod has the right permissions. To make sure, I spun up a test pod with that service account attached and ran: gsutil ls gs://my-bucket/my-backup-folder/collection_04022025/collection which actually returns the folder contents.

This is my backup config inside the solr.xml in case it helps:

  <backup>
    <repository name="gcs" class=".apache.solr.gcs.GCSBackupRepository" default="false">
      <str name="gcsBucket">my-bucket</str>
      <str name="gcsCredentialPath">/etc/secrets/solr-service-account-key</str>

      <int name="gcsClientMaxRetries">5</int>
      <int name="gcsClientHttpInitialRetryDelayMillis">1500</int>
      <double name="gcsClientHttpRetryDelayMultiplier">1.5</double>
      <int name="gcsClientMaxHttpRetryDelayMillis">10000</int>
    </repository>
  </backup>

I'm using solr version 8.11.2.