Vue add apollo is not working

$ vue add apollo
WARN There are uncommited changes in the current repository, it's recommended to commit or stash them first.
? Still proceed? (y/N) y
? Still proceed? Yes

📦 Installing vue-cli-plugin-apollo...

npm ERR! Unexpected end of JSON input while parsing near '..."fileCount":30,"unpac'

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\VFVDV\AppData\Roaming\npm-cache\_logs\2020-09-27T06_43_02_529Z-debug.log
ERROR command failed: npm install --loglevel error vue-cli-plugin-apollo -D