I had the same issue. I removed the ROLLINGCACHE.CCC file in my main MSFS directory (my directory cache) and created it again from scratch in the Rolling Cache Settings menu in the sim. Then I renamed the ROLLINGCACHE.CCC file to MANUALCACHE.CCC, and then created the ROLLINGCACHE.CCC file in the Sim again.
Now, I have two files MANUALCACHE.CCC and ROLLINGCACHE.CCC. It helped me get rid of CTD.