By mistake updated from ionic 3 to ionic 4 and now unable to go back to the ionic 3

[pantarmj]

@lucasbasquerotto. Please help me for one more issue that I posted on forum which is unsolved and no one has replied on that. The link of that issue is given below:

Hammer.min.js.map : Failed to load resource: the server responded with a status of 404 (Not Found) on iOS only

when I am going to details page of my app, an error is coming and app comes on a kind of hang state, I cant go back, cant type, cant even scroll properly… error can be shown below: [17%20PM] this issue is coming on iOS only. Some one help me plz.

please @lucasbasquerotto