Random thought but check permissions on the folder(/home/pi/data/.minio.sys/multipart/57fac6043320d82c0dc8e5332bbf92a93d28feab70e7de8bfaf6a3ea333d99aa/74f2a374-0090-44b8-8126-1f35d785abb7/), I ran into the same issue today.
Turned out to be permissions issue.
To verify run minio with sudo, this is a quick fix and should not be left like this.
In my scenario i was running minio on a mount was formatted as NTFS and hence i could not set permissions on the disk.