sign plugin by npx failed on Ubuntu 20.04

[sangshuduo]

$ nodejs --version
v10.19.0
$ npm --version
6.14.4
$ npx --version
6.14.4
$ yarn --version
0.32+git

$ npx @grafana/toolkit plugin:sign
Building manifest...
TypeError: fs_1.default.promises.opendir is not a function
at /home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/src/plugins/manifest.js:17:80
at step (/home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:140:27)
at Object.next (/home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:121:57)
at resume (/home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:210:48)
at /home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:209:125
at new Promise ()
at Object.i.(anonymous function) [as next] (/home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:209:67)
at Object. (/home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/src/plugins/manifest.js:94:49)
at step (/home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:140:27)
at Object.next (/home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:121:57)
at fulfilled (/home/shuduo/.npm/_npx/18445/lib/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:111:62)
at process._tickCallback (internal/process/next_tick.js:68:7)
at Function.Module.runMain (internal/modules/cjs/loader.js:834:11)
at findNodeScript.then.existing (/usr/share/nodejs/libnpx/index.js:268:14)

[sergejmueller]

@sangshuduo I think, you need Node.JS >= 12.20, better 14 or 15.

[sangshuduo]

@sergejmueller thanks, already solved it with 15.