download.nextcloud.com

attempt01.shell

$ php ~/www/occ app:update --all \
  && php ~/www/updater/updater.phar --no-interaction \
  && ~/www/occ upgrade \
  && php ~/www/occ app:update --all
Nextcloud Updater - version: v16.0.0beta3-4-gc7a4074

Current version is 16.0.2.

Update to Nextcloud 16.0.3 available. (channel: "stable")
Following file will be downloaded automatically: https://download.nextcloud.com/server/releases/nextcloud-16.0.3.zip
Open changelog ↗

Updater run in non-interactive mode.

Start update

Info: Pressing Ctrl-C will finish the currently running step and then stops the updater.

[✔] Check for expected files
[✔] Check for write permissions
[✔] Create backup
[✘] Downloading failed
Curl error: Failed to connect to download.nextcloud.com port 443: Connection timed out

attempt02.shell

$ php ~/www/occ app:update --all \
  && php ~/www/updater/updater.phar --no-interaction \
  && ~/www/occ upgrade \
  && php ~/www/occ app:update --all
Nextcloud Updater - version: v16.0.0beta3-4-gc7a4074

Current version is 16.0.2.

Update to Nextcloud 16.0.3 available. (channel: "stable")
Following file will be downloaded automatically: https://download.nextcloud.com/server/releases/nextcloud-16.0.3.zip
Open changelog ↗

Updater run in non-interactive mode.

Start update

Info: Pressing Ctrl-C will finish the currently running step and then stops the updater.

[✔] Check for expected files
[✔] Check for write permissions
[✔] Create backup
[✘] Downloading failed
Could not do request to updater server: Unknown SSL protocol error in connection to updates.nextcloud.com:443 

Update failed. To resume or retry just execute the updater again.