Flock: 99: Input/ Output error in VSCode SSH plugin

The SSH plugin for VSCode will get lock under ~/.vscode-server by default, but on some servers mounted on NFS the flock: 99: Input/output error
Solution is to acquire the lock, under/TMP In SSH plugin Settings selected LockFiles In Temp, or search remote. SSH. LockfilesInTmp can find this setting.
Reference: http://meta.math.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference