My project won’t load! I’ve looked through the solutions on the forums and I’m not sure if I’m just doing something wrong or whatever but I cannot get this to load!
"The following modules are missing or built with a different engine version:
Would you like to rebuild them now?"
Then
“Levels could not be compiled. Try rebuilding from source manually.”
Please help!! Also – break it down easily for me, as if I’m a n00b. 
Heelllpppp
It looks like you’re either trying to load a project built for an older version of Unreal Engine, or you have project specific plugins built for an older version of the engine than the one you’re using. It’s an error I come across at update time because we use Houdini Engine at the project level. You’ll also get this if you’re using Marketplace assets that aren’t built for the latest Unreal.
There’s a process for updating older project files to new engine versions. Open up the Epic launcher, go to Unreal Engine in the left side menu, and then at the top right, launch the version of Unreal Engine you want.
Then when the launcher opens, you should see your project in that screen, if it’s in the default location. If it’s not, then find it using the explorer menu and add it. When you open it, if it’s for an older version than the one you’re using, you’ll get a message about creating a copy to update it. Create a copy, and the engine will update your project to the new version.
It may still not work. So if it fails with the same error, then find the project you just created - it’ll have “5.3” appended to it.
THEN go into the project files and find the file that’s “yourproject.sln” in the root. Open it up in your IDE (Visual Studio) and then rebuild the project there.
Now it should work. Should. Maybe. Probably.
I’ll try - as well as I can, at least. I’ve tried so many different solutions. I’m still having trouble getting it recovered. I built a structure and that’s all I really want from the project I created and I can’t seem to figure out how to get it back. Guess It’s back to square one…
I’ve literally tried every single way to rebuild my solution and nothing is working. Idk if I’m missing something or what.
I’ve literally tried every single way
There are many ways you can try to recover your project, but we don’t know what you tried but I’ll try to help.
Recovering the project
Did you update the engine to a new version? If yes, then try to remember what the original version of the engine was the project created with (assuming it is still installed on your system). You can go to your .uproject, right-click > Switch Unreal Engine version…
Is your project a C++ one? Open your IDE, navigate to your project name, right-click and choose Rebuild – not Build. It will rebuild the entire thing, and not just the changes.
Do you have plugins installed? Trying to disable them one by one (filter out) which one is causing the issue (beware though if you have code or assets that depends on them). To disable plugins outside of the engine, open your .uproject inside your IDE – not double clicking the uproject. Scroll down to Plugins array and where the plugin says Enabled: true, make it false – remember one by one, then rebuild.
Recovering what you need
I built a structure and that’s all I really want from the project I created
Create a new empty project, then in File Explorer, copy-paste what you want to the new project folder inside “Content” folder. (example your umap and other dependencies like Blueprints). I don’t know what “structure” means but take that to the new project.
If the level is corrupted, just copy-paste the "Structure " to the new project.
Thanks for the response!
Ultimately I ended up just letting it go and rebuilt the structure from scratch. I do appreciate the information, however!
I looked for the Umap, levels, everything and it was gone, but the confusing part is the coding for visual studio was still partially there but it just wouldn’t rebuild. I tried downloading the original version of UE I used but that didn’t work, I tried it in the new one. It ended up just being easier to rebuild it.
Thanks again though! I think I did a better job the second time around anyways. 
