Hello,

I am trying to add the balance of customers to my pdf report but getting this error:

Odoo Server Error
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/qweb.py", line 333, in _compiled_fn
    return compiled(self, append, new, options, log)
  File "", line 1, in template_mosadakat_3ameel_report_res_partner_897
  File "", line 2, in body_call_content_895
  File "", line 3, in foreach_894
  File "", line 4, in body_call_content_892
TypeError: 'NoneType' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 2034, in report_download
    response = self.report_routes(reportname, docids=docids, converter=converter, context=context)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 515, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 1972, in report_routes
    pdf = report.with_context(context).render_qweb_pdf(docids, data=data)[0]
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_actions_report.py", line 737, in render_qweb_pdf
    html = self.with_context(context).render_qweb_html(res_ids, data=data)[0]
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_actions_report.py", line 777, in render_qweb_html
    return self.render_template(self.report_name, data), 'html'
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_actions_report.py", line 548, in render_template
    return view_obj.render_template(template, values)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 1191, in render_template
    return self.browse(self.get_view_id(template)).render(values, engine)
  File "/usr/lib/python3/dist-packages/odoo/addons/web_editor/models/ir_ui_view.py", line 27, in render
    return super(IrUiView, self).render(values=values, engine=engine, minimal_qcontext=minimal_qcontext)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 1199, in render
    return self.env[engine].render(self.id, qcontext)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_qweb.py", line 58, in render
    result = super(IrQWeb, self).render(id_or_xml_id, values=values, **context)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/qweb.py", line 260, in render
    self.compile(template, options)(self, body.append, values or {})
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/qweb.py", line 340, in _compiled_fn
    raise QWebException("Error to render compiling AST", e, path, node and etree.tostring(node[0], encoding='unicode'), name)
odoo.addons.base.models.qweb.QWebException: 'NoneType' object is not subscriptable
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/qweb.py", line 333, in _compiled_fn
    return compiled(self, append, new, options, log)
  File "", line 1, in template_mosadakat_3ameel_report_res_partner_897
  File "", line 2, in body_call_content_895
  File "", line 3, in foreach_894
  File "", line 4, in body_call_content_892
TypeError: 'NoneType' object is not subscriptable

Error to render compiling AST
TypeError: 'NoneType' object is not subscriptable
Template: mosadakat_3ameel.report_res_partner
Path: /t/t/t/t/div[1]/div/span[4]
Node: 
May  anyone  help  in  solving  this  error  please.

Thanks  in  advance.
Waiting  for  an  answer!.
Thank f