Profile picture is rejected

Area: Account and access · Updated: 3 Nov 2026 · Auf Deutsch · All articles

Symptoms

  • The upload answers „Das Bild ist größer als 5 MB.“ (413).
  • „Die Datei ist kein PNG-, JPEG-, WebP- oder HEIC-Bild.“ (415), for example for GIF, SVG, PDF or RAW files.
  • „Die Datei ist ein PNG-Bild, kein JPEG.“ (422): type and content do not match.
  • „Das Bild ist kleiner als 64 × 64 Pixel.“, „Das Bild hat mehr als 40 Megapixel.“ or „Das Bild lässt sich nicht lesen.“ (422).
  • „Du hast in der letzten Stunde zu viele Bilder hochgeladen.“ (429).
  • A HEIC file shows „Dieser Browser kann HEIC nicht anzeigen“ or „Das HEIC-Bild lässt sich nicht lesen“.

Cause

  • The file is larger than 5 MB. Phone photos often are; make the photo smaller or export it as JPEG.
  • The file type is not allowed. X3 checks the first bytes of the file, not only the extension (a renamed GIF stays a GIF).
  • The picture is very small, very large (over 40 megapixels) or damaged.
  • More than 20 pictures in one hour: X3 limits uploads per person.
  • Chrome and Firefox cannot display HEIC. X3 then converts the picture on the server and opens the cropper with it; only a damaged HEIC or a missing image processing on the server stops here.
  • The server has no file storage or image processing (503 not_configured); only the operator can change that.

How to fix it

1. Choose an allowed file

  • In the dashboard: X3 Konto › Profil › Profilbild › Bild hochladen
  • With Claude (MCP): profile_avatar_set {"url":"https://example.com/portrait.jpg"}

PNG, JPEG, WebP or HEIC, at most 5 MB, at least 64 × 64 pixels. Through Claude preferably as an https address; small files also work as contentType + data (base64).

2. HEIC that cannot be converted

  • In the dashboard: X3 Konto › Profil › Profilbild › Anderes Bild wählen
  • With Claude (MCP): profile_avatar_set {"url":"https://example.com/portrait.jpg"}

Export the photo as JPEG or PNG (Photos › Export, or AirDrop to a Mac) and choose it again; the cropper opens directly. Through Claude a JPEG URL works too (the centre or a given crop applies).

3. Try again after an hour

  • In the dashboard: X3 Konto › Profil
  • With Claude (MCP): No MCP tool (the limit is per person for every way alike; waiting helps)

After too many attempts (429) uploads work again after an hour.

How to tell it worked

  • The upload shows „Profilbild gespeichert“ and your picture appears in the circle next to your name.