I have tried the safe-mode, I am also getting the handlebars missing error. Only white screen on the app, along with a load time in ms on the top left.
Uncaught Error: Could not find module `handlebars` imported from `discourse-common/lib/raw-handlebars`
at loader.js:247:1
at c (loader.js:258:1)
at s.findDeps (loader.js:168:1)
at c (loader.js:262:1)
at s.findDeps (loader.js:168:1)
at c (loader.js:262:1)
at requireModule (loader.js:24:1)
at discourse-boot.js:12:1
at Array.forEach (<anonymous>)
at discourse-boot.js:10:1