Hi Hammand
In order for the web search to run in the latest versions of Orthanc, you must modify 2 parameters within the orthanc.json file.
The first is to change the variable "AuthenticationEnabled" to true. The second is to activate the value of the variable "RegisteredUsers" by removing the "//" that appear at the beginning of the line // "alice": "alicePassword" (you can replace alice and alicePassword with a user and a password of your choice.
You should have something like this, for example:
// Whether or not the password protection is enabled
"AuthenticationEnabled": true,
// The list of the registered users. Because Orthanc uses HTTP
// Basic Authentication, the passwords are stored as plain text.
"RegisteredUsers": {"admin": "adminPassword"},
Good luck
William