Can any one please tell me what happens

Traceback (most recent call last):
File “apps/frappe/frappe/website/serve.py”, line 18, in get_response
response = renderer_instance.render()
File “apps/frappe/frappe/website/page_renderers/template_page.py”, line 84, in render
html = self.get_html()
File “apps/frappe/frappe/website/utils.py”, line 517, in cache_html_decorator
html = func(*args, **kwargs)
File “apps/frappe/frappe/website/page_renderers/template_page.py”, line 95, in get_html
self.update_context()
File “apps/frappe/frappe/website/page_renderers/template_page.py”, line 162, in update_context
data = self.run_pymodule_method(“get_context”)
File “apps/frappe/frappe/website/page_renderers/template_page.py”, line 224, in run_pymodule_method
return method(self.context)
File “apps/frappe/frappe/www/printview.py”, line 53, in get_context
body = get_rendered_template(
File “apps/frappe/frappe/www/printview.py”, line 155, in get_rendered_template
format_data_map[df.get(“fieldname”)] = df
AttributeError: ‘str’ object has no attribute ‘get’

And what did you do ? Can you reproduce the problem ?