I am getting error An unexpected error occurred while running yarn add/install

Question

yarn add v1.22.17
[1/4] Resolving packages...
[2/4] Fetching packages...
error An unexpected error occurred: "C:\\Users\\HP\\AppData\\Local\\Yarn\\Cache\\v6\\npm-ethereumjs-util-5.2.1-a833f0e5fca7e5b361384dc76301a721f537bf65-integrity\\node_modules\\ethereumjs-util\\.yarn-metadata.json: Unexpected end of JSON input".

Answer 1

yarn cache clean

this will solve the problem