Quick update... A few weeks ago, a customer service representative from TT reached out to me. They explained why my report was no longer accessible and if we were idled on a page for too long without clicking "save," our report could get lost and access blocked for security reasons.
This explanation seemed odd to me because I should have been able to access at least my most recently saved version. I've also used TT in the past year and never experienced losing access or being completely blocked to a report even if I was idled.
They said a team would look into the possibility of retrieving it for me but advised that I start from scratch. I never heard back from them but I just checked and it seems to be fixed. Fingers crossed for no further issues on this report.
Friendly reminder to everyone.... constantly hit "save"!
