I am not able to upload the new form neither delete the older form from legacy interface. Yesterday I checked the forum and said it was bug and its been fixed. But i am still facing the problem. I am not able to delete the project and upload the new ones.
Welcome to the community @Dnes! FYI, users are still able to upload xlsform directly from the legacy but may not be able to in the near future. However, deleting a project from the legacy is definitely a bug, which our developers have also informed that they will be fixing this soon: