Uploads are locked when the submission period closes so that changes to entries can’t be made until the voting period ends. By removing the file, you may have tripped this system and it auto-removed your entry.
I noticed your submission is still up on itch.io, so we can re-add it to the jam. However, I would ask that you upload the original version of your entry beforehand. Feel free to let me know when you’ve done this and we can start the process!