Error with annotations about pdfquery HOT 3 OPEN

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TypeError                                 Traceback (most recent call last)
<ipython-input-3-6d31003dedab> in <module>()
     13     pdf = pdfquery.PDFQuery("../"+name)
     14     pdf.load()
---> 15     tree = pdf.get_tree()
     16     #tree.write("current.xml", pretty_print=True)
     17 

~/anaconda3/lib/python3.6/site-packages/pdfquery/pdfquery.py in get_tree(self, *page_numbers)
    485                 else:
    486                     pages = enumerate(self.get_layouts())
--> 487                 for n, page in pages:
    488                     page = self._xmlize(page)
    489                     page.set('page_index', obj_to_string(n))

~/anaconda3/lib/python3.6/site-packages/pdfquery/pdfquery.py in <genexpr>(.0)
    606     def get_layouts(self):
    607         """ Get list of PDFMiner Layout objects for each page. """
--> 608         return (self.get_layout(page) for page in self._cached_pages())
    609 
    610     def _cached_pages(self, target_page=-1):

~/anaconda3/lib/python3.6/site-packages/pdfquery/pdfquery.py in get_layout(self, page)
    601         self.interpreter.process_page(page)
    602         layout = self.device.get_result()
--> 603         layout = self._add_annots(layout, page.annots)
    604         return layout
    605 

~/anaconda3/lib/python3.6/site-packages/pdfquery/pdfquery.py in _add_annots(self, layout, annots)
    647                     annot = self._set_hwxy_attrs(annot)
    648                 try:
--> 649                     annot['URI'] = resolve1(annot['A'])['URI']
    650                 except KeyError:
    651                     pass

TypeError: string indices must be integers