I have similar or maybe the same question.
Yesterday I opened a project and all went fine. Today, after update the new version of after effects I open the project and all the archives are missing. They are in the same place, in the same folder. I try to add them again (reload them) but the programme doesn't recognize my png files!. I tried to to open a new poject and import that files, it seems that the programme can not open them now, as if they were non supported files (I had to check the "show all files" to open them). And a window warning with red logo sais: "No se ha podido conectar con el proyecto de Adobe Dynamic Link", .---> We can not connect with the Adobe Dynamic Link project.
I guess that's some issue related with the new update.
I forgot I made another change : I changed the name of one of my directories. The one where I stoked the .ai file I used for my project. Here is why I get this problem !
I don't know if it will help you too...
I just came to answer you too. I uninstall and reinstall the after effects again and all works fine now. Never knows what should happen!.
Glad to hear that.
It seems that we can both go back to our projects then
Glad all is well now for you, Stephane.