Transferring saves from one computer to another (Mass Effect 3)

Hello. Passed ME1, ME2. Moved the save to ME3. Got about halfway through. All this was on one computer. Then I had to move to another city to study, took my laptop with me, copied the saves onto it. I downloaded the same repack that I had before on the first PC. I copied the saves on the laptop to the bioware / mass effect 3 folder. I launch it, I load it, and it says: "The selected save game cannot be loaded. The following downloadable content is missing: unknown." What do you advise? Thank you in advance.