systems service运行错误，status=203/EXEC

配置systemd unit file后，
运行

systemctl daemon-reload
systemctl start clash
systemctl status clash

提示错误

active: failed (result: exit-code)
clash.service: main process exited, code=exited, status=203/EXEC

unitfile的execstart行：
ExecStart=/home/funny_ppt/.config/clash/start.sh
脚本第一行确认加了 #!/bin/bash
排查错误至此，不知道怎么解决