Video Export Become Glitched Failure

hi guys anyone have any idea?

I have this work file in AE,  the preview in the AE looks normal, but when i export it will become this.

i have tried exporting in Premiere, Exporting with Media encorder, and direct render from AE, 

there is no helping, the same glitched video will be the result.

the work file has once appeared a confliced copy in Dropbox folder somehow . i wonder if this is the reason? i have cleared the cached in AE , restarted the PC multiple times, the Softwares are all up to date.

i cannot find any solution now. please help!