You need to stop the Odoo service. Then open cmd then cd to the path of odoo-bin

python odoo-bin -c [Config_file_path] -u web_responsive,vista_backend_theme -d [DB_NAME] --stop-after-init

Once the above command completed you can start the Odoo Service.

This error came from web_responsive module which used by vista theme and you need to update it as per my last comment

I already made that, but doesn't work.

C:\Program Files\Odoo 14.0.20201028\server>python odoo-bin -c odoo.conf -u web_responsive,vista_backend_theme -d lomartex --stop-after-init
Traceback (most recent call last):
File "C:\Program Files\Odoo 14.0.20201028\server\odoo-bin", line 5, in <module>
import odoo
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\__init__.py", line 115, in <module>
from . import osv
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\osv\__init__.py", line 4, in <module>
from . import osv
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\osv\osv.py", line 5, in <module>
from ..models import Model, TransientModel, AbstractModel
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\models.py", line 6289, in <module>
collections.Set.register(BaseModel)
AttributeError: module 'collections' has no attribute 'Set'

C:\Program Files\Odoo 14.0.20201028\server>

You can see in the Python3.10 whatsnew, under the Removed section, the following:

Remove deprecated aliases to Collections Abstract Base Classes from the collections module. (Contributed by Victor Stinner in bpo-37324.)

Unfortunatly , Odoo still use the deprecated alias collections.Set and to fix that error, you can downgrade your python version

https://stackoverflow.com/questions/71130842/attributeerror-module-collections-has-no-attribute-set

Error to render compiling AST
AttributeError: 'res.users' object has no attribute 'chatter_position'
Template: web.webclient_bootstrap
Path: /t/t/t[3]
Node: <t t-set="body_classname" t-value="'o_web_client' + ' o_chatter_position_' + (request.env.user.chatter_position or 'normal')"/> - - -

I get that error on .log
Is any way to set to the default theme of backend ?
I just want to get access to our backend, without any theme. I really need the information that I have there.

I also downgrade to the python 3.8

the chatter_position field in web_responsive module you need to stop the service and update the module using command:

python odoo-bin -c [Config_file_path] -u web_responsive,vista_backend_theme -d [DB_NAME] --stop-after-init

after do your command... this appear:

C:\Program Files\Odoo 14.0.20201028\server>python odoo-bin -c C:\Program Files\Odoo 14.0.20201028\server -u web_responsive,vista_backend_theme -d lomartex --stop-after-init
Usage: odoo-bin [options]

odoo-bin: error: unrecognized parameters: 'Files\Odoo 14.0.20201028\server'

You have to add double quotation to the path and you missed the config file

python odoo-bin -c "C:\Program Files\Odoo 14.0.20201028\server\odoo.conf" -u web_responsive,vista_backend_theme -d lomartex --stop-after-init

we already made it... but ...

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

Traceback (most recent call last):
File "C:\Program Files\Odoo 14.0.20201028\python\lib\site-packages\werkzeug\serving.py", line 306, in run_wsgi
execute(self.server.app)
File "C:\Program Files\Odoo 14.0.20201028\python\lib\site-packages\werkzeug\serving.py", line 294, in execute
application_iter = app(environ, start_response)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\service\server.py", line 440, in app
return self.app(e, s)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\service\wsgi_server.py", line 124, in application
return application_unproxied(environ, start_response)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\service\wsgi_server.py", line 99, in application_unproxied
result = odoo.http.root(environ, start_response)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\http.py", line 1294, in __call__
return self.dispatch(environ, start_response)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\http.py", line 1262, in __call__
return self.app(environ, start_wrapped)
File "C:\Program Files\Odoo 14.0.20201028\python\lib\site-packages\werkzeug\middleware\shared_data.py", line 220, in __call__
return self.app(environ, start_response)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\http.py", line 1464, in dispatch
result = ir_http._dispatch()
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\website_sale\models\ir_http.py", line 15, in _dispatch
return super(IrHttp, cls)._dispatch()
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\website\models\ir_http.py", line 181, in _dispatch
response = super(Http, cls)._dispatch()
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\auth_signup\models\ir_http.py", line 19, in _dispatch
return super(Http, cls)._dispatch()
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\web_editor\models\ir_http.py", line 21, in _dispatch
return super(IrHttp, cls)._dispatch()
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\utm\models\ir_http.py", line 29, in _dispatch
response = super(IrHttp, cls)._dispatch()
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\http_routing\models\ir_http.py", line 512, in _dispatch
result = super(IrHttp, cls)._dispatch()
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\base\models\ir_http.py", line 241, in _dispatch
return cls._handle_exception(e)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\utm\models\ir_http.py", line 34, in _handle_exception
response = super(IrHttp, cls)._handle_exception(exc)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\http_routing\models\ir_http.py", line 602, in _handle_exception
return super(IrHttp, cls)._handle_exception(exception)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\base\models\ir_http.py", line 209, in _handle_exception
return request._handle_exception(exception)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\http.py", line 743, in _handle_exception
return super(HttpRequest, self)._handle_exception(exception)
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\http.py", line 314, in _handle_exception
raise exception.with_traceback(None) from new_cause
odoo.addons.base.models.qweb.QWebException: 'res.users' object has no attribute 'chatter_position'
Traceback (most recent call last):
File "C:\Program Files\Odoo 14.0.20201028\server\odoo\addons\base\models\qweb.py", line 331, in _compiled_fn
return compiled(self, append, new, options, log)
File "<template>", line 1, in template_web_webclient_bootstrap_754
File "<template>", line 2, in body_call_content_752
AttributeError: 'res.users' object has no attribute 'chatter_position'

Error to render compiling AST
AttributeError: 'res.users' object has no attribute 'chatter_position'
Template: web.webclient_bootstrap
Path: /t/t/t[3]
Node: <t t-set="body_classname" t-value="'o_web_client' + ' o_chatter_position_' + (request.env.user.chatter_position or 'normal')"/> - - -
2022-03-29 16:00:13,133 9160 INFO lomartex werkzeug: 192.168.1.72 - - [29/Mar/2022 16:00:13] "GET /favicon.ico HTTP/1.1" 301 - 17 0.013 0.018