Install website_helpdsek

logs

Error:
Odoo Server Error

Traceback (most recent call last):
  File "/opt/odoo/odoo/fields.py", line 937, in __get__
    value = record.env.cache.get(record, self)
  File "/opt/odoo/odoo/api.py", line 960, in get
    value = self._data[field][record.id][key]
KeyError: <odoo.api.Environment object at 0x7f6ec90a2940>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 1355, in _validate_module_views
    self.browse(vid)._check_xml()
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 328, in _check_xml
    view_arch = etree.fromstring(view.arch.encode('utf-8'))
  File "/opt/odoo/odoo/fields.py", line 941, in __get__
    self.determine_value(record)
  File "/opt/odoo/odoo/fields.py", line 1052, in determine_value
    self.compute_value(recs)
  File "/opt/odoo/odoo/fields.py", line 1008, in compute_value
    self._compute_value(records)
  File "/opt/odoo/odoo/fields.py", line 999, in _compute_value
    getattr(records, self.compute)()
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 247, in _compute_arch
    arch_fs = get_view_arch_from_file(fullpath, view.xml_id)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 130, in get_view_arch_from_file
    _fix_multiple_roots(field)
  File "/opt/odoo/odoo/tools/convert.py", line 78, in _fix_multiple_roots
    real_nodes = [x for x in node if not isinstance(x, SKIPPED_ELEMENT_TYPES)]
TypeError: 'NoneType' object is not iterable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/odoo/odoo/tools/safe_eval.py", line 350, in safe_eval
    return unsafe_eval(c, globals_dict, locals_dict)
  File "", line 1, in <module>
  File "<decorator-gen-37>", line 2, in button_immediate_install
  File "/opt/odoo/odoo/addons/base/module/module.py", line 71, in check_and_log
    return method(self, *args, **kwargs)
  File "/opt/odoo/odoo/addons/base/module/module.py", line 448, in button_immediate_install
    return self._button_immediate_function(type(self).button_install)
  File "/opt/odoo/odoo/addons/base/module/module.py", line 541, in _button_immediate_function
    modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "/opt/odoo/odoo/modules/registry.py", line 85, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/opt/odoo/odoo/modules/loading.py", line 380, in load_modules
    loaded_modules, update_module, models_to_check)
  File "/opt/odoo/odoo/modules/loading.py", line 274, in load_marked_modules
    perform_checks=perform_checks, models_to_check=models_to_check
  File "/opt/odoo/odoo/modules/loading.py", line 203, in load_module_graph
    env['ir.ui.view']._validate_module_views(module_name)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 1357, in _validate_module_views
    self.raise_view_error("Can't validate view:\n%s" % e, vid)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 509, in raise_view_error
    raise ValueError(message)
ValueError: Can't validate view:
'NoneType' object is not iterable

Error context:
View `Ticket Received`
[view_id: 2335, xml_id: website_helpdesk_form.aboutus_page_ir_ui_view, model: n/a, parent_id: n/a]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/odoo/odoo/http.py", line 650, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo/odoo/http.py", line 310, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/opt/odoo/odoo/tools/pycompat.py", line 87, in reraise
    raise value
  File "/opt/odoo/odoo/http.py", line 692, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo/odoo/http.py", line 342, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo/odoo/service/model.py", line 97, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo/odoo/http.py", line 335, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/odoo/odoo/http.py", line 936, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo/odoo/http.py", line 515, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo/addons/000/web/controllers/main.py", line 1228, in run
    result = request.env['ir.actions.server'].browse([action_id]).run()
  File "/opt/odoo/odoo/addons/base/ir/ir_actions.py", line 545, in run
    res = func(action, eval_context=eval_context)
  File "/opt/odoo/addons/000/website/models/ir_actions.py", line 57, in run_action_code_multi
    res = super(ServerAction, self).run_action_code_multi(action, eval_context)
  File "/opt/odoo/odoo/addons/base/ir/ir_actions.py", line 421, in run_action_code_multi
    safe_eval(action.sudo().code.strip(), eval_context, mode="exec", nocopy=True)  # nocopy allows to return 'action'
  File "/opt/odoo/odoo/tools/safe_eval.py", line 373, in safe_eval
    pycompat.reraise(ValueError, ValueError('%s: "%s" while evaluating\n%r' % (ustr(type(e)), ustr(e), expr)), exc_info[2])
  File "/opt/odoo/odoo/tools/pycompat.py", line 86, in reraise
    raise value.with_traceback(tb)
  File "/opt/odoo/odoo/tools/safe_eval.py", line 350, in safe_eval
    return unsafe_eval(c, globals_dict, locals_dict)
  File "", line 1, in <module>
  File "<decorator-gen-37>", line 2, in button_immediate_install
  File "/opt/odoo/odoo/addons/base/module/module.py", line 71, in check_and_log
    return method(self, *args, **kwargs)
  File "/opt/odoo/odoo/addons/base/module/module.py", line 448, in button_immediate_install
    return self._button_immediate_function(type(self).button_install)
  File "/opt/odoo/odoo/addons/base/module/module.py", line 541, in _button_immediate_function
    modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "/opt/odoo/odoo/modules/registry.py", line 85, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/opt/odoo/odoo/modules/loading.py", line 380, in load_modules
    loaded_modules, update_module, models_to_check)
  File "/opt/odoo/odoo/modules/loading.py", line 274, in load_marked_modules
    perform_checks=perform_checks, models_to_check=models_to_check
  File "/opt/odoo/odoo/modules/loading.py", line 203, in load_module_graph
    env['ir.ui.view']._validate_module_views(module_name)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 1357, in _validate_module_views
    self.raise_view_error("Can't validate view:\n%s" % e, vid)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 509, in raise_view_error
    raise ValueError(message)
ValueError: <class 'ValueError'>: "Can't validate view:
'NoneType' object is not iterable

Error context:
View `Ticket Received`
[view_id: 2335, xml_id: website_helpdesk_form.aboutus_page_ir_ui_view, model: n/a, parent_id: n/a]" while evaluating
'records.button_immediate_install()'