add

lib/pages/read_web/controller.dart

@@ -597,7 +597,7 @@ class ReadController extends FullLifeCycleController with GetSingleTickerProvide
 
   // 判断是否存在离线文件
   Future<bool> _isExistFile(String bookId) async {
-    String directoryPath = await _getDirectory();
+    String directoryPath = await Tools.getDirectory();
     Directory directory = Directory(directoryPath);
     bool directoryExists = await directory.exists();
     if (directoryExists) {