运行moses，遇错，怎么解决？

[briteming]

hi.

[root@bwg-vps moses]# moses --server --bind 0.0.0.0:2873 --local-cert server_key.pem --remote-cert client_cert.pem --ciphers DHE-RSA-AES128-SHA256
2020-04-13 22:21:23,775:INFO:moses.server:Moses server listening at 0.0.0.0:2873
Traceback (most recent call last):
File "/usr/local/python-3.8.0/bin/moses", line 11, in
load_entry_point('moses==0.10.0', 'console_scripts', 'moses')()
File "/usr/local/python-3.8.0/lib/python3.8/site-packages/moses/cmd.py", line 98, in main
server = server_main(loop, args)
File "/usr/local/python-3.8.0/lib/python3.8/site-packages/moses/server.py", line 62, in server_main
ssl_ctx = misc.build_ssl_ctx(
File "/usr/local/python-3.8.0/lib/python3.8/site-packages/moses/misc.py", line 73, in build_ssl_ctx
ssl_ctx.load_cert_chain(my_certs_file)
ssl.SSLError: [SSL] PEM lib (_ssl.c:3944)
[root@bwg-vps moses]#