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 ביוני,‏ 2026,‏ 4:30pm 3

Local Storage

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

נושא		תגובות	צפיות
User cannot use custom avatar with Amazon S3 Bug	41	6813	21 במרץ,‏ 2015
User uploaded avatar images showing up blank after update Support	2	579	9 בדצמבר,‏ 2021
Avatar uploads broken on subfolder installs? Bug	18	1789	30 באוקטובר,‏ 2018
Uploaded figures dont show Self-hosting	5	1253	22 ביולי,‏ 2015
Avatar upload failing Bug	14	1565	10 בספטמבר,‏ 2018