diff --git a/app/src/main/java/org/lsposed/manager/ui/fragment/RepoFragment.java b/app/src/main/java/org/lsposed/manager/ui/fragment/RepoFragment.java
index 8f71cb74..cd27b69b 100644
--- a/app/src/main/java/org/lsposed/manager/ui/fragment/RepoFragment.java
+++ b/app/src/main/java/org/lsposed/manager/ui/fragment/RepoFragment.java
@@ -216,7 +216,9 @@ public class RepoFragment extends BaseFragment implements RepoLoader.RepoListene
 
     @Override
     public void onRepoLoaded() {
-        adapter.refresh();
+        if (adapter != null) {
+            adapter.refresh();
+        }
         updateRepoSummary();
     }
 
diff --git a/app/src/main/java/org/lsposed/manager/ui/fragment/RepoItemFragment.java b/app/src/main/java/org/lsposed/manager/ui/fragment/RepoItemFragment.java
index 0d9e9abc..7a37ad88 100644
--- a/app/src/main/java/org/lsposed/manager/ui/fragment/RepoItemFragment.java
+++ b/app/src/main/java/org/lsposed/manager/ui/fragment/RepoItemFragment.java
@@ -228,7 +228,9 @@ public class RepoItemFragment extends BaseFragment implements RepoLoader.RepoLis
     @Override
     public void onModuleReleasesLoaded(OnlineModule module) {
         this.module = module;
-        runAsync(releaseAdapter::loadItems);
+        if (releaseAdapter != null) {
+            runAsync(releaseAdapter::loadItems);
+        }
         if (module.getReleases().size() == 1) {
             showHint(R.string.module_release_no_more, true);
         }
@@ -236,7 +238,9 @@ public class RepoItemFragment extends BaseFragment implements RepoLoader.RepoLis
 
     @Override
     public void onThrowable(Throwable t) {
-        runAsync(releaseAdapter::loadItems);
+        if (releaseAdapter != null) {
+            runAsync(releaseAdapter::loadItems);
+        }
         showHint(getString(R.string.repo_load_failed, t.getLocalizedMessage()), true);
     }
 
diff --git a/app/src/main/res/values/themes_override.xml b/app/src/main/res/values/themes_override.xml
index b9514b8c..4e22058c 100644
--- a/app/src/main/res/values/themes_override.xml
+++ b/app/src/main/res/values/themes_override.xml
@@ -60,14 +60,6 @@
         <item name="allowDividerBelow">false</item>
     </style>
 
-    <style name="PreferenceCategoryTitleTextStyle" tools:override="true">
-        <item name="android:fontFamily">sans-serif-medium</item>
-        <item name="android:textAllCaps">true</item>
-        <item name="android:textSize">11sp</item>
-        <!-- 0.8 Spacing, 0.8/11 = 0.072727273 -->
-        <item name="android:letterSpacing">0.072727273</item>
-    </style>
-
     <!-- Base themes -->
     <style name="Base.Light" parent="Theme.Material3.Light" tools:override="true">
         <item name="android:statusBarColor">?android:colorBackground</item>