[MM-61071] Fix errcheck issues in channels/app/admin.go (#28756)

server/channels/app/admin.go

@@ -70,15 +70,19 @@ func (s *Server) QueryLogs(rctx request.CTX, page, perPage int, logFilter *model
 		}
 	}
 
+	var appErr *model.AppError
 	serverNames := logFilter.ServerNames
 	if len(serverNames) > 0 {
 		for _, nodeName := range serverNames {
 			if nodeName == "default" {
-				AddLocalLogs(rctx, logData, s, page, perPage, nodeName, logFilter)
+				appErr = AddLocalLogs(rctx, logData, s, page, perPage, nodeName, logFilter)
 			}
 		}
 	} else {
-		AddLocalLogs(rctx, logData, s, page, perPage, serverName, logFilter)
+		appErr = AddLocalLogs(rctx, logData, s, page, perPage, serverName, logFilter)
+	}
+	if appErr != nil {
+		return nil, appErr
 	}
 
 	if s.platform.Cluster() != nil && *s.Config().ClusterSettings.Enable {
@@ -237,6 +241,6 @@ func (a *App) GetLatestVersion(rctx request.CTX, latestVersionUrl string) (*mode
 	return releaseInfoResponse, nil
 }
 
-func (a *App) ClearLatestVersionCache(rctx request.CTX) {
-	latestVersionCache.Remove("latest_version_cache")
+func (a *App) clearLatestVersionCache() error {
+	return latestVersionCache.Remove("latest_version_cache")
 }