How to solve this 'SyntaxError: Invalid regular expression' in pm2 - node.js

Question

I install node.js with pm2, all install fine but when i try to do pm2 monit give me this error.
$ pm2 monit
/home/node/.nvm/versions/node/v8.11.3/lib/node_modules/pm2/node_modules/fast-printf/dist/src/tokenize.js:4
const TokenRule = /(?:%(?<flag>([+0-]|-\+))?(?<width>\d+)?(?<position>\d+\$)?(?<precision>\.\d+)?(?<conversion>[%BCESb-iosux]))|(\\%)/g;
^
SyntaxError: Invalid regular expression: /(?:%(?<flag>([+0-]|-\+))?(?<width>\d+)?(?<position>\d+\$)?(?<precision>\.\d+)?(?<conversion>[%BCESb-iosux]))|(\\%)/: Invalid group
at Object.<anonymous> (/home/node/.nvm/versions/node/v8.11.3/lib/node_modules/pm2/node_modules/fast-printf/dist/src/tokenize.js:4:19)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/home/node/.nvm/versions/node/v8.11.3/lib/node_modules/pm2/node_modules/fast-printf/dist/src/createPrintf.js:5:20)
at Module._compile (module.js:652:30)
I tried servers nodejs version and always give me this error.

Answer 1

If you paste your regular expression into a regex sandbox, like this one:
https://regex101.com/r/GkwWH2/1
You'll see that it doesn't show any syntax errors.
That would make me suspect that you're running a back-level version of Node JS. And in fact, if you look at your stack trace, you see that you are running Node 8.11.3
at Object.<anonymous> (/home/node/.nvm/versions/node/v8.11.3/lib/node_modules/pm2/node_modules/fas
That regular expression is using features (such as named capture groups) that did not come into Node.js until Node v10.*.
I suggest you update to the latest LTS version of Node, version 14.*: from your stack trace it would appear that you're using NVM, so it should be a simple matter of
sudo nvm install lts/fermium
should do it.