Error when we try to genrate trial balance

[SUPPORT VEONE]

Odoo V8
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/openerp/addons_V1/account_financial_report_webkit/report/webkit_parser_header_fix.py", line 223, in create_single_pdf
**self.parser_instance.localcontext)
File "/usr/lib/python2.7/dist-packages/mako/template.py", line 397, in render
return runtime._render(self, self.callable_, args, data)
File "/usr/lib/python2.7/dist-packages/mako/runtime.py", line 764, in _render
**_kwargs_for_callable(callable_, data))
File "/usr/lib/python2.7/dist-packages/mako/runtime.py", line 796, in _render_context
_exec_template(inherit, lclcontext, args=args, kwargs=kwargs)
File "/usr/lib/python2.7/dist-packages/mako/runtime.py", line 822, in _exec_template
callable_(context, *args, **kwargs)
File "memory:0x922b1d0", line 20, in render_body
<%setLang(user.lang)%>
File "/usr/lib/python2.7/dist-packages/openerp/report/report_sxw.py", line 163, in setLang
env = self.objects.env(self.cr, self.uid, self.localcontext)
AttributeError: 'list' object has no attribute 'env'