Maybe the same trick here will work for you.
https://social.msdn.microsoft.com/Forums/en-US/508b7841-5b0f-4572-9336-52827e9d9e0d/my-projects-on-customvisionai-have-gone-missing?forum=AzureCognitiveService
--please don't forget to upvote
and Accept as answer
if the reply is helpful--