Ionic Cordova PhotoGallery SaveImage can't get permission

Question

I'm building an app with ionic & cordova and I have to display some images and let the user decide which to download to its device.

The code I use to save the image is the following:

this.pl.requestAuthorization().then(()=>{
    this.pl.saveImage(path+"&ext=.jpg","ALBUM").then(()=>{
        this.showAlert("SUCCESS","Image saved");
    }).catch((err)=>{
        this.showAlert("ERROR",err);
    });
});

Explaination: this.pl is the object which refers to the PhotoGallery which is imported in the constructor like every other "import"

this.showAlert is just a function to alert the user

path is the remote URL from the website i show images from, it's something like this

This code above always return error: no permission.

I already put the WRITE_EXTERNAL_STORAGE permission in the AndroidManifest.xml and also tried to ask permission from the plugin, but it didn't work anyway. While using the app, I was asked (only the first time) to acconsent to write access, but no action is ever taken.

Any help?