diff --git a/app/src/main/java/io/legado/app/base/BaseViewModel.kt b/app/src/main/java/io/legado/app/base/BaseViewModel.kt
index 3610a00a5..c8332e0cc 100644
--- a/app/src/main/java/io/legado/app/base/BaseViewModel.kt
+++ b/app/src/main/java/io/legado/app/base/BaseViewModel.kt
@@ -45,9 +45,9 @@ open class BaseViewModel(application: Application) : AndroidViewModel(applicatio
         }
     }
 
-    open fun toast(message: CharSequence) {
+    open fun toast(message: CharSequence?) {
         launch {
-            context.toast(message)
+            context.toast(message ?: toString())
         }
     }
 
@@ -57,9 +57,9 @@ open class BaseViewModel(application: Application) : AndroidViewModel(applicatio
         }
     }
 
-    open fun longToast(message: CharSequence) {
+    open fun longToast(message: CharSequence?) {
         launch {
-            context.toast(message)
+            context.toast(message ?: toString())
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/service/AudioPlayService.kt b/app/src/main/java/io/legado/app/service/AudioPlayService.kt
index 1572dfc99..0b611dd82 100644
--- a/app/src/main/java/io/legado/app/service/AudioPlayService.kt
+++ b/app/src/main/java/io/legado/app/service/AudioPlayService.kt
@@ -266,7 +266,7 @@ class AudioPlayService : BaseService(),
                         removeLoading(chapter.index)
                     }
                 }?.onError {
-                    contentLoadFinish(chapter, it.localizedMessage)
+                    contentLoadFinish(chapter, it.localizedMessage ?: toString())
                     removeLoading(chapter.index)
                 }
         }
diff --git a/app/src/main/java/io/legado/app/web/utils/ReturnData.kt b/app/src/main/java/io/legado/app/web/utils/ReturnData.kt
index 5ea07243f..682c4be15 100644
--- a/app/src/main/java/io/legado/app/web/utils/ReturnData.kt
+++ b/app/src/main/java/io/legado/app/web/utils/ReturnData.kt
@@ -20,7 +20,7 @@ class ReturnData {
         return errorMsg
     }
 
-    fun setErrorMsg(errorMsg: String): ReturnData {
+    fun setErrorMsg(errorMsg: String?): ReturnData {
         this.isSuccess = false
         this.errorMsg = errorMsg
         return this