I use MB Frontend Submission. In one part of it, the user can upload an audio file but I want to restrict the audio format to mp3 or ogg. I have chosen "Type file" (which allows me to restrict the upload to a specific folder) and in the advanced tab > validation I have set the MIME types to audio/mpeg and audio/ogg.
The problem is that the MIME type validation does not work for me. The user can upload a video, which I don't want.
What did I miss?
Thank you for your help.