Workflow Fail/Error in "Copying" files in workflow log

My test workflow loads in data, but continues to fail due to an error in copying the files called. How can I fix the copying error? The files are successfully initialized in the log, in some lines beforehand.

Thanks!

An example of the error code:

[batch_task_logs]2025/06/20 17:43:56 ERROR: [task_id:task/job-d816fac9-3a24-dd06bf95-cc89-49c700-group0-0/0/0,runnable_index:8] Copying gs://fc-secure-6c917763-0f6d-47bf-9cd9-23b033843e8b/references/Mus_musculus.GRCm38.dna.primary_assembly.fasta to file:///mnt/disks/cromwell_root/fc-secure-6c917763-0f6d-47bf-9cd9-23b033843e8b/references/Mus_musculus.GRCm38.dna.primary_assembly.fasta
[batch_task_logs]2025/06/20 17:43:56 ERROR: [task_id:task/job-d816fac9-3a24-dd06bf95-cc89-49c700-group0-0/0/0,runnable_index:8] Copying gs://fc-secure-6c917763-0f6d-47bf-9cd9-23b033843e8b/references/Mus_musculus.GRCm38.dna.primary_assembly.fa.amb to file:///mnt/disks/cromwell_root/fc-secure-6c917763-0f6d-47bf-9cd9-23b033843e8b/references/Mus_musculus.GRCm38.dna.primary_assembly.fa.amb

My test workflow:

version 1.0

struct Runtime {
	Int max_retries
	Int preemptible
	Int mem
	Int cpu
	Int boot_disk_size # must be big enough to store the Docker image
	Int initial_disk_size # padding for disk
}

workflow bwaMem {
	input {
		File ref_fasta
		File read1
		File read2

		File ref_amb
		File ref_ann
		File ref_sa
		File ref_pac
		File ref_bwt
		
		String bwa_docker = "broadinstitute/genomes-in-the-cloud:2.3.1-1512499786"
	}
	
	call bwaMem {
		input:
			read1 = read1,
			read2 = read2,
			ref_sa = ref_sa,
			ref_ann = ref_ann,
			ref_bwt = ref_bwt,
			ref_pac = ref_pac,
			ref_amb = ref_amb,
			ref_fasta = ref_fasta,

			preemptible = 1,
			max_retries = 0,
			boot_disk_size = 15, # GATK magic number
			initial_mem = 15,
			initial_disk_size = 15,
			cpu = 8,
			docker_path = bwa_docker
		}
}

task bwaMem {
	input {
		File read1
		File read2
		File ref_amb
		File ref_ann
		File ref_bwt
		File ref_fasta
		File ref_pac
		File ref_sa
		String docker_path
		# Optional runtime variables (>= 16 GB RAM recommended)
		Int preemptible
		Int boot_disk_size
		Int max_retries
		Int initial_mem
		Int initial_disk_size
		Int cpu 
	}

	Int disk_gb = initial_disk_size 
	Int mem = initial_mem 

	String ref_prefix = basename(ref_fasta)

	command <<<
		echo "TEST"
	>>>

	runtime {
		docker : docker_path
		bootDiskSizeGb: boot_disk_size
		preemptible: preemptible
		cpu: cpu
		disks: "local-disk " + disk_gb + " HDD"
		memory: mem + "GB"
		maxRetries: max_retries
	}
}