Cannot retrieve repository metadata (repomd.xml)

Following Qubes directions on updating Whonix, I get the following result from two consecutive attempts at downloading the two Whonix templates. Futher attempts fail,

Any help appreciated

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[admin@dom0 ~]$ sudo qubes-dom0-update --enablerepo=qubes-templates-community qubes-template-whonix-gw-16 qubes-template-whonix-ws-16
Using sys-whonix as UpdateVM to download updates for Dom0; this may take some time…
Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again

[admin@dom0 ~]$ sudo qubes-dom0-update --enablerepo=qubes-templates-community qubes-template-whonix-gw-16 qubes-template-whonix-ws-16
Using sys-whonix as UpdateVM to download updates for Dom0; this may take some time…
fedora/metalink | 2.7 kB 00:00
fedora | 4.3 kB 00:00
fedora/primary_db | 26 MB 09:06
https://yum.qubes-os.org/r4.0/current/dom0/fc25/repodata/repomd.xml: [Errno 14] curl#60 - “server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none”
Trying other mirror.
Cannot retrieve repository metadata (repomd.xml) for repository: qubes-dom0-current. Please verify its path and try again

Problem overcome by downloading google-chrome using a qube and then moving the file to the template