Can't upgrade to 5.1.0
Upgrade fails via ConfigUI and terminal with the following:

TypeError: Class extends value undefined is not a constructor or null
    at Object.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/socks-proxy-agent/dist/agent.js:114:44)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:94:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/socks-proxy-agent/dist/index.js:5:33)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:94:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/make-fetch-happen/lib/agent.js:161:25)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)