assertion failed error

[qq495679584]

windows7 shadowsocks— obfs-local obfs=tls

ERROE

2020-04-23 15:14:55 [simple-obfs] INFO: obfuscating enabled
2020-04-23 15:14:55 [simple-obfs] INPO: listening at 127.0.0.1:1467
Assertion failed!

Progran: E:\SS\obfs-local.exe
File: ev.c, Line 3070

Expression: ("libev: ev_io_start called with negative fd", fd>=0>
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.