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Issue

So I was going to work on an Ionic app that I was working on last year and I didn't change anything in framework or anything. So I launch the command "ionic serve" and my app crashes saying a lot of imports don't work like in the picture:

• I've tried installing rxjs-compat (even though I haven't updated rxjs) and still doesn't work.
• I just did "npm i" just in case something was missing and then launched my app.

Does anyone know what could be the reason that is making everything crash?

Solution

Looks like you got unexpected updates.

Please check root directory of your project, if npm i didn't work it means you don't have package-lock.json. If you have it - try to delete node_modules and execute npm install again.

Also check whether yarn.lock is there, then you need to use yarn to install proper packages.

Without yarn.lock and package-lock.json you can only guess suitable versions. If you remember a date when it worked - try to check which versions were actual then on http://npmjs.com/ and specify them explicitly in the packages.json without ^ or ~ prefix.

Answered By - satanTime