So i logged into my project and was about to click my map and it was gone but the built data was still there and when i tried to click the data it says failed to load and when i try to see the problem it just shows a blank message log

Development Programming & Scripting
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Hello, your problem sounds similar to this:

In it, @drummerof13 says:

This might not help Dash07, but hopefully it helps anyone else who runs across this. I had the same issue and was able to “fix” it by deleting the .umap file from \Documents\Unreal Projects[projectname]\Content* and replacing it with the most recent copy found in \Documents\Unreal Projects[projectname]\Saved\Backup. When I renamed the backup file to match the name of my level, UE4 immediately recognized it, and it showed up in my Content Browser. This copy works without issue.

Maybe you should try it (you will need to use File Explorerer). Just make sure to backup the .umap file somewhere before deleting it in case this doesn’t work.

Hope this helps!