It seems I can’t upload profile banners on my instance anymore…
Here’s what I have at /preferences/profile
This parameter is checked:
I’ve checked in safe mode and I still have the problem. 
Any thoughts?
AI-generated summary
The discussion revolves around an issue where Olivier_Lambert cannot see or upload a profile header or user card background on their instance’s /preferences/profile page, despite having the necessary permissions and being a staff user. sam suggests checking trust levels and trying safe mode, but Olivier_Lambert notes that they’ve tried these troubleshooting steps without success. khenmu asks about the theme being used, to which Olivier_Lambert responds that they’re using the default light/dark theme with custom CSS. JammyDodger tests the issue by signing up on the instance and finds that they can upload a profile header and user card background, suggesting the issue may be specific to Olivier_Lambert’s account. sam and khenmu continue to offer troubleshooting suggestions, including checking if the issue persists on Meta to rule out browser or extension issues.
This is not reproducing on meta…
Does the user have the right trust level? Are there any non-official plugins installed?
I’m a staff user and it doesn’t show. Also, I’ve tried safe mode with no plugins
Safe mode does not disable server side changes. I recommend removing 3rd party plugins and trying again. Meta is running tests-passed and I am not seeing the issue here.
Could I ask which theme your site is using?
I’ve seen some do… strange things. (Even the team’s.)
Good to know! Will def try that.
Default light/dark with custom CSS.
Yes, that’s the one. Well I’ll be damned. I can’t see them when I’m logged in as an admin! I’ve tried inspecting the elements and I couldn’t find the id=“profile-background-uploader”.
Will try to load without plugins to see if that’s what’s up! Thank you all for your help. 
Huh. That’s interesting.
If you don’t mind me asking, do the options show for you here on Meta?
Reason I ask is, while it’s not impossible it’s a Discourse plugin issue, if it was, I would expect it to affect everyone. Checking your preferences here on Meta would clarify whether it’s a web browser setting / extension that’s responsible. Only asking as it’s quick to check & it would be good to rule them out.
Admins can also have trust levels and this can sometimes in rare cases muck stuff up. Did you set yours to Trust level 4?