upgrading plugins and packages might caused your app to crash.
I wonder if you are trying to load some fonts?
Failed to load resource: the server responded with a status of 404 (OK)
roboto-light.woff:1 Failed to load resource: the server responded with a status of 404 (OK)
roboto-light.ttf:1 Failed to load resource: the server responded with a status of 404 (OK)
while this could be the reason why your app crash.
vendor.js:1 Uncaught Error: Cannot find module “.”
You should keep the packages and plugins version that your project is compatible with:
this is a sample from your package.json:
"@angular/animations": "^7.2.15",
"@angular/common": "^7.2.15",
"@angular/compiler": "^7.2.15",
"@angular/compiler-cli": "^7.2.15",
"@angular/core": "^7.2.15",
"@angular/forms": "^7.2.15",
"@angular/forms": "^7.2.15",
while i have a project - ionic 3 - see the deference:
"@angular/animations": "5.2.11",
"@angular/common": "5.2.11",
"@angular/compiler": "5.2.11",
"@angular/compiler-cli": "5.2.11",
"@angular/core": "5.2.11",
"@angular/forms": "5.2.11",
"@angular/http": "5.2.11",
you need to figure out which package version is compatible with ionic 3 project, create a new project and compare your package.json with new project package.json
other thing you could do, run your project from another PC