I am getting this error while selecting the document layout in general setting, The purpose of using this document layout is to print cash receipt in pos.
Note: we are trying to use the A5 size paper, we don't want the thermal receipt to be printed.
Error:
Odoo Server Error
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 85, in lookup
    r = d[key]
  File "/home/odoo/src/odoo/odoo/tools/func.py", line 71, in wrapper
    return func(self, *args, **kwargs)
  File "/home/odoo/src/odoo/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
KeyError: ('ir.qweb', , 'web.report_assets_pdf', 'en_US', True, False, '1', False, False, False, (None,))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 85, in lookup
    r = d[key]
  File "/home/odoo/src/odoo/odoo/tools/func.py", line 71, in wrapper
    return func(self, *args, **kwargs)
  File "/home/odoo/src/odoo/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
KeyError: ('ir.qweb', , 'web.report_assets_pdf', 'en_US', (None,))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 85, in lookup
    r = d[key]
  File "/home/odoo/src/odoo/odoo/tools/func.py", line 71, in wrapper
    return func(self, *args, **kwargs)
  File "/home/odoo/src/odoo/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
KeyError: ('ir.qweb', , 'web.report_assets_pdf', ('en_US', False, None, False, False, None, None))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 85, in lookup
    r = d[key]
  File "/home/odoo/src/odoo/odoo/tools/func.py", line 71, in wrapper
    return func(self, *args, **kwargs)
  File "/home/odoo/src/odoo/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
KeyError: ('ir.ui.view', , 2, True, 'web.report_assets_pdf', (None,))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 357, in get_template
    document = options.get('load', self._load)(template, options)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_qweb.py", line 118, in _load
    view_id = self.env['ir.ui.view'].get_view_id(name)
  File "", line 2, in get_view_id
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 90, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/home/odoo/src/odoo/addons/website/models/ir_ui_view.py", line 331, in get_view_id
    raise ValueError('View %r in website %r not found' % (xml_id, self._context['website_id']))
ValueError: View 'web.report_assets_pdf' in website None not found
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 2121, in report_download
    response = self.report_routes(reportname, docids=docids, converter=converter, context=context)
  File "/home/odoo/src/odoo/odoo/http.py", line 532, in response_wrap
    response = f(*args, **kw)
  File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 2056, in report_routes
    pdf = report.with_context(context)._render_qweb_pdf(docids, data=data)[0]
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_actions_report.py", line 808, in _render_qweb_pdf
    bodies, html_ids, header, footer, specific_paperformat_args = self_sudo.with_context(context)._prepare_html(html)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_actions_report.py", line 382, in _prepare_html
    body = layout_with_lang._render(dict(subst=False, body=lxml.html.tostring(node), base_url=base_url))
  File "/home/odoo/src/odoo/addons/website/models/ir_ui_view.py", line 411, in _render
    return super(View, self)._render(values, engine=engine, minimal_qcontext=minimal_qcontext)
  File "/home/odoo/src/odoo/addons/web_editor/models/ir_ui_view.py", line 28, in _render
    return super(IrUiView, self)._render(values=values, engine=engine, minimal_qcontext=minimal_qcontext)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_ui_view.py", line 1717, in _render
    return self.env[engine]._render(self.id, qcontext)
  File "/home/odoo/src/enterprise/web_studio/models/ir_qweb.py", line 44, in _render
    return super(IrQWeb, self)._render(template, values=values, **options)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_qweb.py", line 55, in _render
    result = super(IrQWeb, self)._render(id_or_xml_id, values=values, **context)
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 258, in _render
    self.compile(template, options)(self, body.append, values or {})
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 333, in _compiled_fn
    raise e
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 331, in _compiled_fn
    return compiled(self, append, new, options, log)
  File "", line 1, in template_web_minimal_layout_2142
  File "", line 2, in _get_asset_nodes
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 90, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_qweb.py", line 294, in _get_asset_nodes
    files, remains = self._get_asset_content(xmlid, options)
  File "", line 2, in _get_asset_content
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 90, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_qweb.py", line 324, in _get_asset_content
    template = IrQweb._render(xmlid, {"get_modules_order": get_modules_order})
  File "/home/odoo/src/enterprise/web_studio/models/ir_qweb.py", line 44, in _render
    return super(IrQWeb, self)._render(template, values=values, **options)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_qweb.py", line 55, in _render
    result = super(IrQWeb, self)._render(id_or_xml_id, values=values, **context)
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 258, in _render
    self.compile(template, options)(self, body.append, values or {})
  File "", line 2, in compile
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 90, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_qweb.py", line 110, in compile
    return super(IrQWeb, self).compile(id_or_xml_id, options=options)
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 275, in compile
    element, document = self.get_template(template, options)
  File "/home/odoo/src/enterprise/web_studio/models/ir_qweb.py", line 22, in get_template
    element, document = super(IrQWeb, self).get_template(template, options)
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 363, in get_template
    raise QWebException("load could not load template", e, path, name=template)
odoo.addons.base.models.qweb.QWebException: View 'web.report_assets_pdf' in website None not found
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 85, in lookup
    r = d[key]
  File "/home/odoo/src/odoo/odoo/tools/func.py", line 71, in wrapper
    return func(self, *args, **kwargs)
  File "/home/odoo/src/odoo/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
KeyError: ('ir.qweb', , 'web.report_assets_pdf', 'en_US', True, False, '1', False, False, False, (None,))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 85, in lookup
    r = d[key]
  File "/home/odoo/src/odoo/odoo/tools/func.py", line 71, in wrapper
    return func(self, *args, **kwargs)
  File "/home/odoo/src/odoo/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
KeyError: ('ir.qweb', , 'web.report_assets_pdf', 'en_US', (None,))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 85, in lookup
    r = d[key]
  File "/home/odoo/src/odoo/odoo/tools/func.py", line 71, in wrapper
    return func(self, *args, **kwargs)
  File "/home/odoo/src/odoo/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
KeyError: ('ir.qweb', , 'web.report_assets_pdf', ('en_US', False, None, False, False, None, None))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 85, in lookup
    r = d[key]
  File "/home/odoo/src/odoo/odoo/tools/func.py", line 71, in wrapper
    return func(self, *args, **kwargs)
  File "/home/odoo/src/odoo/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
KeyError: ('ir.ui.view', , 2, True, 'web.report_assets_pdf', (None,))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 357, in get_template
    document = options.get('load', self._load)(template, options)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_qweb.py", line 118, in _load
    view_id = self.env['ir.ui.view'].get_view_id(name)
  File "", line 2, in get_view_id
  File "/home/odoo/src/odoo/odoo/tools/cache.py", line 90, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/home/odoo/src/odoo/addons/website/models/ir_ui_view.py", line 331, in get_view_id
    raise ValueError('View %r in website %r not found' % (xml_id, self._context['website_id']))
ValueError: View 'web.report_assets_pdf' in website None not found
load could not load template
ValueError: View 'web.report_assets_pdf' in website None not found
Template: web.report_assets_pdf
