Error starting 2.7.0 upgrade

[Gabri.91]

Hello,
I'm trying to upgrade to 2.7.0 but it fails even before starting.

I can see the upgrade in the dashboard, click confirm upgrade and I got this error:

Another instance of pfSense-upgrade is running.  Try again later

Upgrading from console (Option 13) I have these errors:

Certificate verification failed for /C=IT/ST=Italy/O=IT
34368225280:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:/var/jenkins/workspace/pfSense-CE-snapshots-2_7_0-main/sources/FreeBSD-src-RELENG_2_7_0/crypto/openssl/ssl/statem/statem_clnt.c:1921:
pfSense-repoc-static: failed to fetch the repo data
failed to read the repo data.
failed to update the repository settings!!!
failed to update the repository settings!!!

Any idea?
Thanks

[Gabri.91]

Solved:
I had a static DNS entry for ews.netgate.com to 127.0.0.1 added in the past to speedup dashboard loading time in case of internet down
Removed it, now I've started the upgrade