diff --git a/backend/plugins/github/tasks/issue_extractor.go b/backend/plugins/github/tasks/issue_extractor.go
index 2f80c928617..575ff15279c 100644
--- a/backend/plugins/github/tasks/issue_extractor.go
+++ b/backend/plugins/github/tasks/issue_extractor.go
@@ -91,7 +91,7 @@ func ExtractApiIssues(taskCtx plugin.SubTaskContext) errors.Error {
 	config := data.Options.ScopeConfig
 	issueRegexes, err := NewIssueRegexes(config)
 	if err != nil {
-		return nil
+		return err
 	}
 
 	extractor, extErr := api.NewStatefulApiExtractor(&api.StatefulApiExtractorArgs[IssuesResponse]{
diff --git a/backend/plugins/github/tasks/issue_extractor_test.go b/backend/plugins/github/tasks/issue_extractor_test.go
index b8294240ace..341cd5a4be2 100644
--- a/backend/plugins/github/tasks/issue_extractor_test.go
+++ b/backend/plugins/github/tasks/issue_extractor_test.go
@@ -21,6 +21,9 @@ import (
 	"testing"
 	"time"
 
+	"github.com/apache/devlake/helpers/unithelper"
+	mockdal "github.com/apache/devlake/mocks/core/dal"
+	"github.com/apache/devlake/plugins/github/models"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -40,3 +43,21 @@ func TestIssueLeadTimeMinutes(t *testing.T) {
 	// Closed before created, as GitHub reports for some transferred issues.
 	assert.Nil(t, IssueLeadTimeMinutes(createdAt, createdAt.Add(-44*time.Minute)))
 }
+
+func TestExtractApiIssuesReturnsIssueRegexError(t *testing.T) {
+	mockDal := new(mockdal.Dal)
+	taskCtx := unithelper.DummySubTaskContext(mockDal)
+	taskCtx.On("GetData").Return(&GithubTaskData{
+		Options: &GithubOptions{
+			ConnectionId: 1,
+			Name:         "apache/devlake",
+			ScopeConfig:  &models.GithubScopeConfig{IssueSeverity: "severity/(.*"},
+		},
+	})
+
+	err := ExtractApiIssues(taskCtx)
+
+	if assert.NotNil(t, err) {
+		assert.Contains(t, err.Error(), "issueSeverity")
+	}
+}
diff --git a/backend/plugins/github_graphql/tasks/issue_extractor.go b/backend/plugins/github_graphql/tasks/issue_extractor.go
index 3f15bd0d949..7b05aaaec52 100644
--- a/backend/plugins/github_graphql/tasks/issue_extractor.go
+++ b/backend/plugins/github_graphql/tasks/issue_extractor.go
@@ -47,11 +47,11 @@ func ExtractIssues(taskCtx plugin.SubTaskContext) errors.Error {
 	config := data.Options.ScopeConfig
 	issueRegexes, err := githubTasks.NewIssueRegexes(config)
 	if err != nil {
-		return nil
+		return err
 	}
 	milestoneMap, err := getMilestoneMap(db, data.Options.GithubId, data.Options.ConnectionId)
 	if err != nil {
-		return nil
+		return err
 	}
 
 	extractor, err := api.NewApiExtractor(api.ApiExtractorArgs{
diff --git a/backend/plugins/github_graphql/tasks/issue_extractor_test.go b/backend/plugins/github_graphql/tasks/issue_extractor_test.go
new file mode 100644
index 00000000000..d1b9f2fba1f
--- /dev/null
+++ b/backend/plugins/github_graphql/tasks/issue_extractor_test.go
@@ -0,0 +1,70 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package tasks
+
+import (
+	"testing"
+
+	"github.com/apache/devlake/core/errors"
+	"github.com/apache/devlake/helpers/unithelper"
+	mockdal "github.com/apache/devlake/mocks/core/dal"
+	"github.com/apache/devlake/plugins/github/models"
+	githubTasks "github.com/apache/devlake/plugins/github/tasks"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+)
+
+func TestExtractIssuesReturnsIssueRegexError(t *testing.T) {
+	mockDal := new(mockdal.Dal)
+	taskCtx := unithelper.DummySubTaskContext(mockDal)
+	taskCtx.On("GetData").Return(&githubTasks.GithubTaskData{
+		Options: &githubTasks.GithubOptions{
+			ConnectionId: 1,
+			Name:         "apache/devlake",
+			ScopeConfig:  &models.GithubScopeConfig{IssueSeverity: "severity/(.*"},
+		},
+	})
+
+	err := ExtractIssues(taskCtx)
+
+	if assert.NotNil(t, err) {
+		assert.Contains(t, err.Error(), "issueSeverity")
+	}
+}
+
+func TestExtractIssuesReturnsMilestoneQueryError(t *testing.T) {
+	dbErr := errors.Default.New("db unavailable")
+	mockDal := new(mockdal.Dal)
+	mockDal.On("All", mock.Anything, mock.Anything).Return(dbErr).Once()
+	taskCtx := unithelper.DummySubTaskContext(mockDal)
+	taskCtx.On("GetData").Return(&githubTasks.GithubTaskData{
+		Options: &githubTasks.GithubOptions{
+			ConnectionId: 1,
+			GithubId:     101,
+			Name:         "apache/devlake",
+			ScopeConfig:  &models.GithubScopeConfig{},
+		},
+	})
+
+	err := ExtractIssues(taskCtx)
+
+	if assert.NotNil(t, err) {
+		assert.Contains(t, err.Error(), "db unavailable")
+	}
+	mockDal.AssertExpectations(t)
+}