Hi there
—– sounds like your project cannot find the source images and is showing you colour bars.
– fairly new to AE myself but pretty sure the answer is as follows and this is certainly how I fixed it myself….
I reckon that when you load a project AE looks for the source material where it was LOCATED when the project was first built.
If the image isnt there it shows you colour bars.
… when this problem occured on a comp I was working on I tried re-importing source material and replacing dicky looking layers but without much luck ( dont know why this didnt work – thought it would ) HOWEVER I then realised the PSD file I used in the build was not on the desktop anymore …
…. when I replaced PSD on desktop ( where it was when I built project ) everything was ok again…
If you are seeing colour bars my guess is this is the problem….
——– anyway hope this works and good luck —– chris