bluisier I'm running into the same issue with image/jpeg files. Converting to png and then uploading works fine.

Just for the record: we're running into the same problem after migrating to 14.1 the day before yesterday. jpg or jpeg doesn't work, png is fine.

    TutoRapide Yep, there's a bug. For now, you can run composer require symfony/mime:v5.1.9 to fix it temporaryly

      4 days later

      luuhai48 Also works for me. Is this a bug that will be fixed by an update of the mime package, or is it an incompatibility with the uploader?