How to fix error 401.1 on team foundation website - authentication

Question

I have Team Foundation server 4 years and suddenly all the users not authorized, even the admin users.
When I try to open the website in the server on http://localhost:8080/tfs I get error 401.1
The website work on Windows authentication.
This the failure message in the event viewer:
An account failed to log on.
Subject: Security ID: NULL SID Account Name: - Account Domain: -
Logon ID: 0x0
Logon Type: 3
Account For Which Logon Failed: Security ID: NULL SID Account
Name: ttre Account Domain: WIN-0000000
Failure Information: Failure Reason: An Error occured during Logon.
Status: 0xc0000008 Sub Status: 0x0
Process Information: Caller Process ID: 0x0 Caller Process Name: -
Network Information: Workstation Name: WIN-00000000 Source Network
Address: f280::524:66531:1525:455a Source Port: 52911
Detailed Authentication Information: Logon Process: NtLmSsp
Authentication Package: NTLM Transited Services: - Package Name (NTLM
only): - Key Length: 0
This event is generated when a logon request fails. It is generated on
the computer where access was attempted.
The Subject fields indicate the account on the local system which
requested the logon. This is most commonly a service such as the
Server service, or a local process such as Winlogon.exe or
Services.exe.
The Logon Type field indicates the kind of logon that was requested.
The most common types are 2 (interactive) and 3 (network).
The Process Information fields indicate which account and process on
the system requested the logon.
The Network Information fields indicate where a remote logon request
originated. Workstation name is not always available and may be left
blank in some cases.
The authentication information fields provide detailed information
about this specific logon request.
- Transited services indicate which intermediate services have participated in this logon request.
- Package name indicates which sub-protocol was used among the NTLM protocols.
- Key length indicates the length of the generated session key. This will be 0 if no session key was requested.
Any idea?