Upload and Submission Form for the Mittelalternativ-Challenge
Uploading is technically separate from the submission form. You can upload a piece first and then register. Or upload afterwards. I.e. if you have uploaded a large file and the registration form fails it is enough to submit the registration again. The music is already "here".
If the upload form still doesn't work please upload your own audio file yourself elsewhere and send an email with artist, license, title and the download link to email@example.com.