Around 10 months ago I deployed TDE on a database I was developping, when I turned it off I was confronted with this problem.

I had to remove the database and use a backup from for the TDE to restore it, luckily no data was lost since it was still a 'proof-of-concept' database.

A few months later we deployed it without TDE since we still needed a lot of work and now we're in the process of removing it since its design no longer fits into the concept it was designed for.