fix: no entities specified, use all entities enabled by default (#6450)

* fix: no entities specified, use all entities enabled by default

* fix: no entities specified, use all entities enabled by default
diff --git a/backend/helpers/pluginhelper/api/pipeline_plan.go b/backend/helpers/pluginhelper/api/pipeline_plan.go
index 2623765..ce920b1 100644
--- a/backend/helpers/pluginhelper/api/pipeline_plan.go
+++ b/backend/helpers/pluginhelper/api/pipeline_plan.go
@@ -19,6 +19,7 @@
 
 import (
 	"fmt"
+
 	"github.com/apache/incubator-devlake/core/errors"
 	plugin "github.com/apache/incubator-devlake/core/plugin"
 	"github.com/apache/incubator-devlake/core/utils"
@@ -27,8 +28,9 @@
 // MakePipelinePlanSubtasks generates subtasks list based on sub-task meta information and entities wanted by user
 func MakePipelinePlanSubtasks(subtaskMetas []plugin.SubTaskMeta, entities []string) ([]string, errors.Error) {
 	subtasks := make([]string, 0)
+	// if no entities specified, use all entities enabled by default
 	if len(entities) == 0 {
-		return subtasks, nil
+		entities = plugin.DOMAIN_TYPES
 	}
 	wanted := make(map[string]bool, len(entities))
 	for _, entity := range entities {