che errore è

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 99, in lookup
    r = d[key]
        ~^^^^^
  File "/usr/lib/python3/dist-packages/decorator.py", line 232, in fun
    return caller(func, *(extras + args), **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/tools/func.py", line 87, in locked
    return func(inst, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/tools/lru.py", line 34, in __getitem__
    a = self.d[obj]
        ~~~~~~^^^^^
KeyError: ('ir.model.data', <function IrModelData._xmlid_lookup at 0x7f0346153740>, 'Generate_JSON.action_generate_json')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 556, in _tag_root
    f(rec)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 312, in _tag_menuitem
    act = self.env.ref(a_action).sudo()
          ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 580, in ref
    res_model, res_id = self['ir.model.data']._xmlid_to_res_model_res_id(
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_model.py", line 2189, in _xmlid_to_res_model_res_id
    return self._xmlid_lookup(xmlid)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/decorator.py", line 232, in fun
    return caller(func, *(extras + args), **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 104, in lookup
    value = d[key] = self.method(*args, **kwargs)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_model.py", line 2182, in _xmlid_lookup
    raise ValueError('External ID not found in the system: %s' % xmlid)
ValueError: External ID not found in the system: Generate_JSON.action_generate_json

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

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1765, in _serve_db
    return service_model.retrying(self._serve_ir_http, self.env)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 133, in retrying
    result = func()
             ^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1792, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1996, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 222, in _dispatch
    result = endpoint(**request.params)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 722, in route_wrapper
    result = endpoint(self, *args, **params_ok)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/dataset.py", line 28, in call_button
    action = self._call_kw(model, method, args, kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/dataset.py", line 20, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 468, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 453, in _call_kw_multi
    result = method(recs, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/decorator.py", line 232, in fun
    return caller(func, *(extras + args), **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 75, in check_and_log
    return method(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 657, in button_immediate_upgrade
    return self._button_immediate_function(self.env.registry[self._name].button_upgrade)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 590, in _button_immediate_function
    registry = modules.registry.Registry.new(self._cr.dbname, update_module=True)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/decorator.py", line 232, in fun
    return caller(func, *(extras + args), **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/tools/func.py", line 87, in locked
    return func(inst, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/modules/registry.py", line 113, in new
    odoo.modules.load_modules(registry, force_demo, status, update_module)
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 476, in load_modules
    processed_modules += load_marked_modules(env, graph,
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 364, in load_marked_modules
    loaded, processed = load_module_graph(
                        ^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 227, in load_module_graph
    load_data(env, idref, mode, kind='data', package=package)
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 71, in load_data
    tools.convert_file(env, package.name, filename, idref, mode, noupdate, kind)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 627, in convert_file
    convert_xml_import(env, module, fp, idref, mode, noupdate)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 693, in convert_xml_import
    obj.parse(doc.getroot())
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 613, in parse
    self._tag_root(de)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 569, in _tag_root
    raise ParseError('while parsing %s:%s, somewhere inside\n%s' % (
odoo.tools.convert.ParseError: while parsing /opt/odoo/custom_addons/Generate_JSON/views/generate_json_view.xml:23, somewhere inside
<menuitem id="menu_generate_json" name="Generate JSON" parent="menu_generate_json_root" action="action_generate_json" sequence="10"/>

The above server error caused the following client error:
RPC_ERROR: Odoo Server Error
    at makeErrorFromResponse (http://34.118.19.210/web/assets/b1849d1/web.assets_web.min.js:2879:163)
    at XMLHttpRequest.<anonymous> (http://34.118.19.210/web/assets/b1849d1/web.assets_web.min.js:2883:13)