I don’t know why I cannot upload attachments, such as photos after a successful Discourse Docker installation. And If I choose an avatar at Discourse ID before I log in a new account, the avatar can be displayed correctly. When I try to later on change a avatar, it fails again. I want to know how …

Which option have you chosen for upload storage?

Failed Uploading Avatar and Photos

LetITFly (LetITFly) 29 juni 2026 om 16:30 3

Local Storage

Finally it resolved because I found the issue is on CDN Cloudflare,

Topic		Antwoorden	Weergaven
User cannot use custom avatar with Amazon S3 Bug	41	6813	21 maart 2015
User uploaded avatar images showing up blank after update Support	2	579	9 december 2021
Avatar uploads broken on subfolder installs? Bug	18	1789	30 oktober 2018
Uploaded figures dont show Self-hosting	5	1253	22 juli 2015
Avatar upload failing Bug	14	1565	10 september 2018