Hello,

I'm testing modules but I keep having the same error for many of them when installing (ex : Project Dashboard, Mediocre DHX Gantt, Web Gantt View for Project Task in Odoo Community).
I am on Odoo 15 Community on my PC.

Here is the error when I click on the "Install" button.

8< ----------------------------------------------------------------------
RPC_ERROR
Odoo Server Error
Traceback (most recent call last):
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\cache.py", line 85, in lookup
r = d[key]
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\func.py", line 71, in wrapper
return func(self, *args, **kwargs)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\lru.py", line 34, in __getitem__
a = self.d[obj]
KeyError: ('ir.model.data', , 'web.assets_backend')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 680, in _tag_root
f(rec)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 658, in _tag_template
return self._tag_record(record)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 567, in _tag_record
f_val = self.id_get(f_ref)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 663, in id_get
res = self.model_id_get(id_str, raise_if_not_found)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 669, in model_id_get
return self.env['ir.model.data']._xmlid_to_res_model_res_id(id_str, raise_if_not_found=raise_if_not_found)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\addons\base\models\ir_model.py", line 1935, in _xmlid_to_res_model_res_id
return self._xmlid_lookup(xmlid)[1:3]
File "", line 2, in _xmlid_lookup
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\cache.py", line 90, in lookup
value = d[key] = self.method(*args, **kwargs)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\addons\base\models\ir_model.py", line 1928, in _xmlid_lookup
raise ValueError('External ID not found in the system: %s' % xmlid)
ValueError: External ID not found in the system: web.assets_backend

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\addons\base\models\ir_http.py", line 237, in _dispatch
result = request.dispatch()
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\http.py", line 687, in dispatch
result = self._call_function(**self.params)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\http.py", line 359, in _call_function
return checked_call(self.db, *args, **kwargs)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\service\model.py", line 94, in wrapper
return f(dbname, *args, **kwargs)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\http.py", line 348, in checked_call
result = self.endpoint(*a, **kw)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\http.py", line 916, in __call__
return self.method(*args, **kw)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\http.py", line 535, in response_wrap
response = f(*args, **kw)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\addons\web\controllers\main.py", line 1351, in call_button
action = self._call_kw(model, method, args, kwargs)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\addons\web\controllers\main.py", line 1339, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\api.py", line 464, in call_kw
result = _call_kw_multi(method, model, args, kwargs)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\api.py", line 451, in _call_kw_multi
result = method(recs, *args, **kwargs)
File "", line 2, in button_immediate_install
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\addons\base\models\ir_module.py", line 74, in check_and_log
return method(self, *args, **kwargs)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\addons\base\models\ir_module.py", line 483, in button_immediate_install
return self._button_immediate_function(type(self).button_install)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\addons\base\models\ir_module.py", line 600, in _button_immediate_function
registry = modules.registry.Registry.new(self._cr.dbname, update_module=True)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\modules\registry.py", line 87, in new
odoo.modules.load_modules(registry, force_demo, status, update_module)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\modules\loading.py", line 476, in load_modules
loaded_modules, update_module, models_to_check)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\modules\loading.py", line 365, in load_marked_modules
perform_checks=perform_checks, models_to_check=models_to_check
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\modules\loading.py", line 222, in load_module_graph
load_data(cr, idref, mode, kind='data', package=package)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\modules\loading.py", line 69, in load_data
tools.convert_file(cr, package.name, filename, idref, mode, noupdate, kind)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 745, in convert_file
convert_xml_import(cr, module, fp, idref, mode, noupdate)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 811, in convert_xml_import
obj.parse(doc.getroot())
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 731, in parse
self._tag_root(de)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 680, in _tag_root
f(rec)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\tools\convert.py", line 697, in _tag_root
)) from e
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\http.py", line 643, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "C:\Program Files\Odoo 15.0.20220717\server\odoo\http.py", line 301, in _handle_exception
raise exception.with_traceback(None) from new_cause
odoo.tools.convert.ParseError: while parsing None:10, somewhere inside









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I didnt' find any solution on the forum.
Has anyone an idea of the problem ?

Thanks,