Media Offline

Today May 7th 2018 I installed DaVinci Resolve for the first time to begin learning how to collor grade some Super 16mm film I shot. So for the last 5 hours I have been color grading the different clips. I have been saving every once and a while. So i had finished the color grading and I was going to start to see how to export the footage with the color correction applied but (this never happens at all) the power went off for just a second and came back on. And this has left me with large red letters in my edit window MEDIAOFFLINE.
So I look though the list of thing here on this form but really could not find what I needed to help me get my
footage back on line.
So I look though the list of thing here on this form but really could not find what I needed to help me get my
footage back on line.