ngFor first throws error but works

Ionic Framework ionic-v3
1

I am pulling some img data from database and loading them into page with this:

    <div *ngFor="let shop of shopData">
    <img src={{shop}}/>
  </div>

This is the error i get:

Cannot find a differ supporting object ‘[object Object]’ of type ‘object’. NgFor only supports binding to Iterables such as Arrays.

I close the error page and images are loaded with ngfor like there is no error ?? btw i get data as array