Debug code

internal/server/grpc_router.go

@@ -80,6 +80,7 @@ func (s *rueckfrageRouter) GetAttachmentMetadata(ctx context.Context, in *pb.Grp
 	})
 
 	if response == nil {
+		logger.Error("File Get Metadata Error: %v", err)
 		return nil, err
 	}