What changed? Is your Camera Raw up to date? What version of AE down to the decimal point? What OS down to the decimal point? There's not much to go on.
These days I've noticed that there are updates, AE, camera raw. premiere, and others. Now on AE 184.108.40.206 no longer able to import RAW files. Cr2, I have not tried it with other raw files, also if i do a reverse time on a video composition will appear black. And if I use the AE 220.127.116.11 color stabilazed, always makes me black video, the same with AE 18.104.22.168
thanks Todd, I resolved