I got this error after stopping a clone job. The clone job stopped but it did not unlock the template object.
SSH to the host or open the host’s shell by going to Datacenter > <host> then select Shell.
If you’re on a default install with the default hostname this link might work.
Use the command qm unlock <VM ID> to unlock the source VM/template.
qm unlock
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TASK ERROR: clone failed: cfs-lock ‘storage-‘ error: got lock request timeout