Can't log in and data deleted.

I haven't been playing long I won't lie. So I gotta know, is this normal?

My Ensemble Stars game crashed, so I reopened the game. When I did, it needed an update. After the update, I found I was unable to log into my account; it was saying my account did not exist. I only use my email to log in, and that is what I used when registering for the account. So there isn't anything else I could use to log in with.

Is there anything I can do to fix this? Any help would be great. I'm not exactly sure how or where to contact support. I'm so lost on how this happened, especially since I was quite literally actively playing the game when this occurred. Any advice or help would be appreciated.