Server error at the front of any page

Hello folks,

Does someone has experienced this error? It gets me in front of any page /app, /login etc. It doesn’t let me pass thru…

 Server Error

Traceback (most recent call last):
  File "apps/frappe/frappe/app.py", line 95, in application
    init_request(request)
  File "apps/frappe/frappe/app.py", line 191, in init_request
    frappe.local.http_request = HTTPRequest()
  File "apps/frappe/frappe/auth.py", line 42, in __init__
    self.set_session()
  File "apps/frappe/frappe/auth.py", line 76, in set_session
    frappe.local.login_manager = LoginManager()
  File "apps/frappe/frappe/auth.py", line 118, in __init__
    self.make_session(resume=True)
  File "apps/frappe/frappe/auth.py", line 204, in make_session
    frappe.local.session_obj = Session(
  File "apps/frappe/frappe/sessions.py", line 207, in __init__
    self.resume()
  File "apps/frappe/frappe/sessions.py", line 270, in resume
    data = self.get_session_record()
  File "apps/frappe/frappe/sessions.py", line 287, in get_session_record
    r = self.get_session_data()
  File "apps/frappe/frappe/sessions.py", line 303, in get_session_data
    data = self.get_session_data_from_db()
  File "apps/frappe/frappe/sessions.py", line 335, in get_session_data_from_db
    data = frappe._dict(frappe.safe_eval(record and record[0][1] or "{}"))
  File "apps/frappe/frappe/__init__.py", line 2322, in safe_eval
    return safe_eval(code, eval_globals, eval_locals)
  File "apps/frappe/frappe/utils/safe_exec.py", line 122, in safe_eval
    return eval(
  File "<safe_eval>", line 1, in <module>
NameError: name 'null' is not defined

And then it says Status 500

Saludos

Im using Frappe and ErpNext version-15 on a Rocky Linux 8

It solved by Cleaning cache and cookies browser.