Issue: Can’t set a Custom GPT icon—both “Create image” and manual upload show “Unknown error.”
Tried: Chrome/Edge, Incognito, home/work networks, off-VPN, phone browser, PNG/JPG (50–75 KB), and a known-good 512×512 JPG.
Path: GPT Builder → Configure → Image.
Request: Please reset/refresh my account’s icon/image permissions/flags for GPT Builder. If possible, try setting any icon on my GPT to confirm.
6 Likes
This is a persistent platform-wide issue on ChatGPT.
The flow of the GPT builder with a user file is to make a call to
POST https://chatgpt.com/backend-api/files
With the size and virtual file name.
Which returns an blob storage upload ID URL and corresponding file ID.
Then the GPT site retrieves a script for form uploading, and attempts
PUT https//filesNN.oaiusercontent.com/file-....
This is returning a status 201 created. The headers of the PUT request are Accept:application/json, text/plain, but no json content is returned.
Then there is a:
POST https://chatgpt.com/backend-api/files/process_upload_stream
Which like it says, is an event stream of communication for the file ID.
With failure. Failure on either webp or png.
Generating an image, still referred to as “DALL-E”, also fails. Either by the direct option or by asking the builder.
2 Likes
I have the same issue. No custom or Dall-e for the GPT Icon.
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Same here can we get a fix - I know it is not as important as AGI but it would be nice.
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Thank you very much, this solved it for me!
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it doesn’t work for me. Are there any other solutions to propose?
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this solution didn’t work
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Just create a profile image in ChatGPT, and upload it as profile image in GPT Builder under Configure tab.
Thanks for the suggestion, but that is already reported as failing, which continues:
OpenAI seems to have removed the “generate with DALL-E” option completely from the same drop-down at the icon at the top of “configure” in the last week. So they are “aware” enough to disable.
2 Likes
I also believe, I confirm that at the moment it still doesn’t work
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@raw_j, I ran into this 2 days ago. I’ve in the queue like everyone else.
The fix you shared from Reddit nailed it! Thanks for sharing.
For others that have tried this, but it was unsuccessful (my initial attempt failed as well)
- I found that the tab you include the prompt to request the profile image, is specific.
- The request to use the image as the icon works when typing in the “Create” tab, not Configure tab
Fixed! Many thankssssss !!
On the ‘Create’ tab of your custom GPT, upload a suitable icon, that does NOT contain any text, followed by the prompt:
”Use the <FName.jpg> file I just uploaded, as the image for this Custom GPT”
Example Below:
ChatGPT will update the image.
This worked for me today, on this Custom GPT.
1 Like
it’s work! Thanks.
upload any photo and use “Use the <.jpg> file I just uploaded, as the image for this Custom GPT”
I’m currently having this issue when I try to upload an “avatar” or image for a custom GPT. I got several “unknown error” messages and then “Failed upload to files . oaiusercontent . com. Please ensure your network settings allow access to this site or contact your network administrator.”
- I am my own network administrator on my home network.
- My firewall on this computer is not active.
- When I connect through a mobile hotspot I continue to get “unknown error” messages.
- Apple M1 Max, MacOS Tahoe v.26.1
- Incognito Mode does not solve it for me
- Turning firewall off and on or on and off does not solve it for me
- Other browsers do not work
- Internet provider troubleshooting did not work
1 Like
I noticed this is not an unfamiliar issue. However, I haven’t read a clear response to solve my problem. I’m trying to upload a logo for a new custom GPT (500x500 png). I receive a vague error message saying only, “Unknown error occurred”. I cleared my cache and I used incognito. No luck. I’ve uploaded logos without issue before. Any ideas? Is OpenAI aware of this?
The issue as a fix that I’ve used.
Someone else have shared this earlier, but I do not remember who and where so this is the fix.
- Go to update / create page of the GPT
- Go the the “configure” tab
- Add the image file you want as icon on the resources section using the “upload files” button (please copy the name of this file
) - Go to the “create” tab of this page.
- To the chat section of the create tab, just say : “use the file as the GPT icon”
And this is it, the gpt’ Do the job
Oh that’s it 
Thanks for the sharing, it works very well.