So for a little under 2 months, I've been working on a map for Doom 2. Last night before I went to sleep, I saved my map and shut down my computer. Today, I open up Doom Builder to work on it again a bit more and I find that no maps are recognized. So, I open the WAD in Slade3 and see that there is nothing inside of it. Help? Below is a link to download the WAD in case anyone needs the file itself to fix it. https://jumpshare.com/v/Ut709jcWrDnrTKTmaRCj
(I feel like this is probably common and I'm just stupid for not finding how to fix it.)