diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/ChapterLoader.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/ChapterLoader.kt
index 8038068c56..280423ae09 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/ChapterLoader.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/ChapterLoader.kt
@@ -1,5 +1,6 @@
 package eu.kanade.tachiyomi.ui.reader.loader
 
+import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.download.DownloadManager
 import eu.kanade.tachiyomi.source.LocalSource
@@ -84,7 +85,7 @@ class ChapterLoader(
                     is LocalSource.Format.Epub -> EpubPageLoader(format.file)
                 }
             }
-            else -> error("Loader not implemented")
+            else -> error(downloadManager.context.getString(R.string.source_not_installed))
         }
     }
 }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsBrowseController.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsBrowseController.kt
index d93f28b640..7727fed5d6 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsBrowseController.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsBrowseController.kt
@@ -70,7 +70,7 @@ class SettingsBrowseController : SettingsController() {
                         (preferences.pinnedCatalogues().get() ?: emptySet()).joinToString("/")
                     preferences.migrationSources().set(pinnedSources)
                     (activity as? MainActivity)?.setUndoSnackBar(view?.snack(
-                        R.string.migration_sources_set
+                        R.string.migration_sources_changed
                     ) {
                         setAction(R.string.undo) {
                             preferences.migrationSources().set(ogSources)
@@ -92,7 +92,9 @@ class SettingsBrowseController : SettingsController() {
                             .sortedBy { "(${it.lang}) ${it.name}" }
                             .joinToString("/") { it.id.toString() }
                     preferences.migrationSources().set(enabledSources)
-                    (activity as? MainActivity)?.setUndoSnackBar(view?.snack(R.string.migration_sources_set) {
+                    (activity as? MainActivity)?.setUndoSnackBar(view?.snack(
+                        R.string.migration_sources_changed
+                    ) {
                         setAction(R.string.undo) {
                             preferences.migrationSources().set(ogSources)
                         }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 64129da337..653fe74fc0 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -386,6 +386,7 @@
     <string name="failed_to_update_cover">Failed to update cover</string>
     <string name="must_be_in_library_to_edit">Manga must be in your library to edit</string>
     <string name="remember_this_choice">Remember this choice</string>
+    <string name="source_not_installed">Source not installed</string>
     <plurals name="deleted_chapters">
         <item quantity="one">A chapter has been removed from the source:\n%2$s\nDelete
             its download?</item>
@@ -560,7 +561,7 @@
         migration</string>
     <string name="use_last_saved_migration_preferences">Use last saved pre-migration preferences
     and sources to mass migrate</string>
-    <string name="migration_sources_set">Migration sources set</string>
+    <string name="migration_sources_changed">Migration sources changed</string>
     <string name="you_can_migrate_in_library">You can also migrate by selecting manga in your
         library</string>