if nothing works , can you share your file
how do you do that?
zip your project file and upload it somewhere like on your google drive and share the link of that file
You’d screwed up the per project engine settings somehow, a lot 
Exit the editor, and then remove everything in the config folder, then restart
your default engine file causes that issue .
go to your project folder - config- DefaultEngine file and delete anything related to nav mesh
delete this part , save file and restart your project
here you can find your default engine file
am i doing it wrong. Its just not getting fixed and plus its loading up a different level
DefaultEngine.ini (1.6 KB)
paste this file in your config folder and check
you are using zip file , i am not sure you can save changes to zip file without extraction
do in you original file (if you want you can take copy of default engine file as backup).
could you send me the one you fixed?
its still not working
DefaultEngine.ini (1.6 KB)
here
nono the whole project file. Only if you could
i did not do any other changes to your file , but no problem i am uploading file as well you can check if that doesn’t work i would say somehow your installation file are screwed , you should uninstall unreal engine and then install it again and as a beginner you should install it in your c drive .
Lesgooo it worked
glad it worked , 
Try resizing the NavMesh so it has your floor inside it.