AttributeError while lazy loading tweets

[hvelarde]

the following error is being shown is a customer's log:

2016-08-05T19:23:09 ERROR plone.transformchain Unexpected error whilst trying to apply transform chain
Traceback (most recent call last):
  File "/home/conversaafiada/conversaafiada.portal/eggs/plone.transformchain-1.0.4-py2.7.egg/plone/transformchain/transformer.py", line 48, in __call__
    newResult = handler.transformIterable(result, encoding)
  File "/home/conversaafiada/conversaafiada.portal/eggs/collective.lazysizes-1.5.0b1-py2.7.egg/collective/lazysizes/transform.py", line 164, in transformIterable
    for el in result.tree.xpath(path):
  File "/home/conversaafiada/conversaafiada.portal/eggs/collective.lazysizes-1.5.0b1-py2.7.egg/collective/lazysizes/transform.py", line 118, in _lazyload
    elif element.tag == 'blockquote':
  File "/home/conversaafiada/conversaafiada.portal/eggs/collective.lazysizes-1.5.0b1-py2.7.egg/collective/lazysizes/transform.py", line 99, in _lazyload_tweet
    try:
AttributeError: 'NoneType' object has no attribute 'attrib'