There are several login errors.

You specified an incorrect user name or password.

Picture 2: Incorrect user name or password

You are trying to log in as System administrator but Administrative logins are disabled.

Picture 3: Administrative logins are disabled

You are trying to log in as System administrator but your IP address is not listed in the Trusted IP addresses list.

Picture 4: User’s IP is not listed in Trusted IP list

You tried to log in with an incorrect username or password more times than allowed by the TC/Web configuration.

Picture 5: Access from user’s IP address is blocked

You cannot access TC/Web with the current protocol. You must change the protocol to HTTP or HTTPS and try once again.

Picture 6: Access with current protocol is blocked

You are trying to log in as an Administrator but with a wrong protocol type. You must change the protocol to HTTP or HTTPS and try once again.

Picture 7: Administrative login with current protocol is blocked