Error backing up to Backblaze

I’ve been backing up to Backblaze B2 for over a year now. Suddenly it stopped working. It appears there’s a problem connecting to Backblaze.

Log (I replaced the names and had to break up the URLs b/c the forum only allows 2 links per post):

Running backup command from /home/NAME/.duplicacy-web/repositories/localhost/0 to back up /media/data/Music
Options: [-log backup -storage BACKUPNAME -threads 4 -stats]
2021-04-02 12:00:05.750 INFO REPOSITORY_SET Repository set to /media/data/Music
2021-04-02 12:00:05.750 INFO STORAGE_SET Storage set to b2://BACKUPNAME
2021-04-02 12:00:06.184 INFO BACKBLAZE_URL download URL is: https:// f000.backblazeb2. com
2021-04-02 12:09:18.741 ERROR STORAGE_CONFIG Failed to download the configuration file from the storage: Head https:// f000.backblazeb2. com/file/BACKUPNAME/config: dial tcp 0.0.0.0:443: connect: connection refused
Failed to download the configuration file from the storage: Head https:// f000.backblazeb2. com/file/BACKUPNAME/config: dial tcp 0.0.0.0:443: connect: connection refused

I’m able to ping https://f000.backblazeb2.com just fine from the terminal.

I’m on KDE neon 5.21

Thanks to 384c9382883b76114d6b, I added https://f000.backblazeb2.com to my dns allowlist and now it’s working again. Phew!

Interesting. I use a pi-hole and just noticed the same problem. Gravity (the block list), was blocking https://f000.backblazeb2.com/
I updated gravity, and that fixed it… backblaze must have snuck onto the black list by mistake.
At any rate, I whitelisted backblaze to prevent any future problems.
All good now