failed to copy: httpReadSeeker

failed to copy: httpReadSeeker: failed open: failed to do request: Get "https://hub-mirror.c.163.com/v2/jc21/nginx-proxy-manager/blobs/sha256:e53e87b0740476098e532b9715d68a910319716ab637de84b93d15d51bae1cd0?ns=docker.io": EOF

I opened a VPN but it still doesn't work