** (FunctionClauseError) no function clause matching in URI.parse/1    
    
    The following arguments were given to URI.parse/1:
    
        # 1
        nil
    
    (elixir 1.19.3) lib/uri.ex:787: URI.parse/1
    (microformats2 1.0.1) lib/helpers.ex:77: Microformats2.Helpers.abs_uri/3
    (microformats2 1.0.1) lib/implied/photo.ex:8: Microformats2.Items.Implied.Photo.implied_value/4
    (microformats2 1.0.1) lib/implied.ex:26: Microformats2.Items.Implied.implied_photo_property/5
    (microformats2 1.0.1) lib/implied.ex:10: Microformats2.Items.Implied.parse/5
    (microformats2 1.0.1) lib/items.ex:28: Microformats2.Items.parse/5
    (microformats2 1.0.1) lib/items.ex:11: Microformats2.Items.parse/5
    (microformats2 1.0.1) lib/microformats2.ex:101: Microformats2.parse/3