Cases have been changed and added.

Changed description of the “Server User Not In Sudo” case.
Corrected the name and description of the "ServerPacketManagerError" case. Packet to Package.
Adding a "SudoPackageIsNotPreinstalled" case.
Adding a "ServerUserNotAllowedInSudoers" case.
Adding a "ServerUserPasswordRequired" case.

client/core/errorstrings.cpp

@@ -20,8 +20,11 @@ QString errorString(ErrorCode code) {
     case(ErrorCode::ServerContainerMissingError): errorMessage = QObject::tr("Server error: Docker container missing"); break;
     case(ErrorCode::ServerDockerFailedError): errorMessage = QObject::tr("Server error: Docker failed"); break;
     case(ErrorCode::ServerCancelInstallation): errorMessage = QObject::tr("Installation canceled by user"); break;
-    case(ErrorCode::ServerUserNotInSudo): errorMessage = QObject::tr("The user does not have permission to use sudo"); break;
-    case(ErrorCode::ServerPacketManagerError): errorMessage = QObject::tr("Server error: Packet manager error"); break;
+    case(ErrorCode::ServerUserNotInSudo): errorMessage = QObject::tr("The user is not a member of the sudo group"); break;
+    case(ErrorCode::ServerPackageManagerError): errorMessage = QObject::tr("Server error: Package manager error"); break;
+    case(ErrorCode::SudoPackageIsNotPreinstalled): errorMessage = QObject::tr("The sudo package is not pre-installed"); break;
+    case(ErrorCode::ServerUserNotAllowedInSudoers): errorMessage = QObject::tr("Action not allowed in sudoers"); break;
+    case(ErrorCode::ServerUserPasswordRequired): errorMessage = QObject::tr("The user's password is required"); break;
 
     // Libssh errors
     case(ErrorCode::SshRequestDeniedError): errorMessage = QObject::tr("SSH request was denied"); break;