Question by rscoder7 · Aug 15, 2020 at 01:30 AM · unityeditor error message not working packages manifest

Unity will not open, failed to update manifest.json,Unity will not open because of a package error.

Unity won't open, it just keeps on giving me a "failed to update project manifest" error. I used to get a "packages could not be resolved" error with the old version I was using but now failed to update project manifest error is happening.

I've tried many fixes including deleting the package-lock file and deleting cache and library folder but none are working.

image of error

error.png (28.7 kB)

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andrew-lukasik · Nov 17, 2020 at 02:32 PM 0

"while writing the file" suggest some other application (win explorer or any text editor) is preventing write access for Unity. Try closing all other applications or restarting the system.