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Etcher can't detect by polkit daemon

See original GitHub issue

Etcher version:1.4.8
Operating system and architecture: Arch Linux x86_64
Image flashed:archlinux-iso
Do you see any meaningful error information in the DevTools?

I tried to flash an iso and it couldn’t detect my Polkit daemon. I use i3wm so I still don’t quite understand about Polkit. I have the Polkit base package installed and the qt5 and gnome frontends installed but it still doesn’t detect any authentication agents

here is some info from Log:

{"stack":"Error: No polkit authentication agent found\n    at Object.exports.createError 
(/usr/lib/etcher/lib/shared/errors.js:253:17)\n    at Object.exports.createUserError 
(/usr/lib/etcher/lib/shared/errors.js:292:18)\n    at sudoPrompt.execAsync.then.catch.catch.catch.catch  
(/usr/lib/etcher/lib/shared/permissions.js:244:18)\n    at tryCatcher 
(/usr/lib/etcher/node_modules/bluebird/js/release/util.js:16:23)\n    
at /usr/lib/etcher/node_modules/bluebird/js/release/catch_filter.js:34:37\n    
at tryCatcher (/usr/lib/etcher/node_modules/bluebird/js/release/util.js:16:23)\n    
at Promise._settlePromiseFromHandler (/usr/lib/etcher/node_modules/bluebird/js/release/promise.js:504:31)\n
at Promise._settlePromise (/usr/lib/etcher/node_modules/bluebird/js/release/promise.js:561:18)\n
at Promise._settlePromise0 (/usr/lib/etcher/node_modules/bluebird/js/release/promise.js:606:10)\n    
at Promise._settlePromises (/usr/lib/etcher/node_modules/bluebird/js/release/promise.js:681:18)\n    
at Async._drainQueue (/usr/lib/etcher/node_modules/bluebird/js/release/async.js:138:16)\n    
at Async._drainQueues (/usr/lib/etcher/node_modules/bluebird/js/release/async.js:148:10)\n    
at Async.drainQueues (/usr/lib/etcher/node_modules/bluebird/js/release/async.js:17:14)\n    a
t <anonymous>\n    at process._tickCallback 
(internal/process/next_tick.js:188:7)","message":"No polkit authentication agent found","description":
"Please install a polkit authentication agent for your desktop environment of choice to continue","report":false}