Pouchdb does not replicate on iOS9

I am developing an app with IONIC and PouchDB. The app correctly synchronizes with remote CouchDB and works perfectly well on Android. But the PouchDB fails to sync on iOS.
I am testing on iOS 9 and iPhone 5S and using IONIC View.

On a dig down session I found that each time the ‘paused’ event is listened:

PouchDB.replicate(remote_db, local_db, {
            live: true,
            retry: true
        }).on('change', function (info) {
            // handle change
        }).on('paused', function (err) {
            // replication paused (e.g. user went offline)            
        }).on('active', function () {
            // replicate resumed (e.g. user went back online)
        }).on('denied', function (info) {
            // a document failed to replicate, e.g. due to permissions
        }).on('complete', function (info) {
            // handle complete
        }).on('error', function (err) {
            // handle error

On further digging I found that the **Error** object says that the adapter is missing

I then used FruitDown Adapter, but the situation did not improve.

Can anyone suggest how to solve this issue ??