tenancy became inactive all of a sudden

My tenancy suddenly became inactive and my instances are gone/inaccessible

I tried to SSH into one of my instances to realize than it was offline, and logged in to check on my instances. My account was locked out due to a number of failed password attempts and have recovered it soon after. When I logged back in, all of my instances are gone with an error saying that I do not have permission to view resources in my (root) compartment.

Everything under this tenancy are inaccessible due to 'Missing Permissions' (despite being in the root compartment), along with 'Authorization failed or requested resource not found' errors.