Describe the bug
我一直在使用shadowsocksX-NG 1.9.2版本，但是突然没有办法从屏幕上面扫描到有效的二维码添加节点（我将macOS升级到了Catalina系统后发现），我之后升级到了1.9.4的版本，但是还是有同样的问题。

To Reproduce
Steps to reproduce the behavior

Expected behavior
希望可以成功扫描二维码添加节点

Screenshots
If applicable, add screenshots to help explain your problem.

System and Shadowsocksx-NG version: (please complete the following information):

• macOS Catalina version 10.15.3
• shadowsocksX-NG 1.9.4

Diagnoisis file:

ShadowsocksX-NG_diagnose_20200203_112335.txt

ss-local.log

Please upload the ss-local.log file here the file is in ~/Library/Logs
ss-local的副本.log

Application log

Open the Console.app and search Shadowsocksx-NG
Copy paste the log here

Crash Log

If the app crashes and pop up a crash log, please copy and paste here

Additional context
Add any other context about the problem here.