DNS error and unable to create backup files (abort as soon as I click on 'Create' with error "Unknown error, see supervisor logs")

Hi, I’m seeing these errors in the log file on my Home Assistant at the cottage that I’m trying to upgrade.

2022-12-16 20:29:18 WARNING (SyncWorker_2) [urllib3.connectionpool] Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xffff97d81850>: Failed to establish a new connection: [Errno -2] Name does not resolve')': /
2022-12-16 20:29:18 ERROR (SyncWorker_2) [blinkpy.auth] Connection error. Endpoint https://rest-u023.immedia-semi.com1661950698.jpg possibly down or throttled.
2022-12-16 20:29:19 WARNING (SyncWorker_2) [urllib3.connectionpool] Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xffff979e1280>: Failed to establish a new connection: [Errno -2] Name does not resolve')': /
2022-12-16 20:29:21 WARNING (SyncWorker_2) [urllib3.connectionpool] Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xffff979e3f10>: Failed to establish a new connection: [Errno -2] Name does not resolve')': /
2022-12-16 20:29:25 WARNING (SyncWorker_2) [urllib3.connectionpool] Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xffff97949430>: Failed to establish a new connection: [Errno -2] Name does not resolve')': /
2022-12-16 20:29:25 ERROR (SyncWorker_2) [blinkpy.auth] Connection error. Endpoint https://rest-u023.immedia-semi.com1661950652.jpg possibly down or throttled.
2022-12-16 20:29:25 WARNING (SyncWorker_2) [urllib3.connectionpool] Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xffff979f3820>: Failed to establish a new connection: [Errno -2] Name does not resolve')': /

When trying to create a backup, it fails with this error (and the reason I went checking in the log file):

Failed to to call /snapshots/reload -
8:39:17 PM – Hass.io (ERROR) - message first occurred at 8:29:13 PM and shows up 3 times
/snapshots/reload return code 404
8:39:17 PM – Hass.io (ERROR) - message first occurred at 8:29:13 PM and shows up 3 times

I checked the DNS name resolution on the host (nslookup google.com) and it did successfully resolve it.

I spawn a shell in the hassio_dns docker container and did another nslookup google.com there and that one also resolved successfully.

Don’t know what else to check. Anybody have a clue why or some idea to point me in a direction to fix this?

Thanks.