Getting an empty file when I try to print a PDF in Odoo 10 and 8 Already installed wkhtmltopdf but still getting the error.

copy of the error is below

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/odoo/addons/report/controllers/main.py", line 96, in report_download
    response = self.report_routes(reportname, docids=docids, converter='pdf')
  File "/usr/lib/python2.7/site-packages/odoo/http.py", line 506, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python2.7/site-packages/odoo/addons/report/controllers/main.py", line 45, in report_routes
    pdf = report_obj.with_context(context).get_pdf(docids, reportname, data=data)
  File "/usr/lib/python2.7/site-packages/odoo/addons/report/models/report.py", line 178, in get_pdf
    html = self.with_context(context).get_html(docids, report_name, data=data)
  File "/usr/lib/python2.7/site-packages/odoo/addons/report/models/report.py", line 144, in get_html
    return self.render(report.report_name, docargs)
  File "/usr/lib/python2.7/site-packages/odoo/addons/report/models/report.py", line 120, in render
    return view_obj.render_template(template, values)
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_ui_view.py", line 1037, in render_template
    return self.browse(self.get_view_id(template)).render(values, engine)
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_ui_view.py", line 1057, in render
    return self.env[engine].render(self.id, qcontext)
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_qweb/ir_qweb.py", line 53, in render
    return super(IrQWeb, self).render(id_or_xml_id, values=values, **context)
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_qweb/qweb.py", line 248, in render
    self.compile(template, options)(self, body.append, values or {})
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_qweb/qweb.py", line 317, in _compiled_fn
    raise e
QWebException: None
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_qweb/qweb.py", line 341, in get_template
    document = options.get('load', self.load)(template, options)
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_qweb/ir_qweb.py", line 81, in load
    template = env['ir.ui.view'].read_template(name)
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_ui_view.py", line 932, in read_template
    return self._read_template(self.get_view_id(xml_id))
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_ui_view.py", line 944, in get_view_id
    return self.env['ir.model.data'].xmlid_to_res_id(template, raise_if_not_found=True)
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_model.py", line 1084, in xmlid_to_res_id
    return self.xmlid_to_res_model_res_id(xmlid, raise_if_not_found)[1]
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_model.py", line 1075, in xmlid_to_res_model_res_id
    return self.xmlid_lookup(xmlid)[1:3]
  File "<string>", line 2, in xmlid_lookup
  File "/usr/lib/python2.7/site-packages/odoo/tools/cache.py", line 87, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/odoo/addons/base/ir/ir_model.py", line 1064, in xmlid_lookup
    raise ValueError('External ID not found in the system: %s' % xmlid)
ValueError: External ID not found in the system: web_editor.summernote

load could not load template
Template: web_editor.summernote