grafana添加zabbix源，报错zabbix 密码以及数据库密码核对过没有问题。错误代码404。
grafana error log：
t=2021-09-28T16:37:55+0800 lvl=eror msg="Request Completed" logger=context userId=1 orgId=1 uname=admin method=POST path=/api/datasources/8/resources/zabbix-api status=500 remote_addr=10.15.3.209 time_ms=16 size=83 referer=http://10.15.3.42:3000/datasources/edit/jYLYA8H7z
Environment :
- Grafana version:Grafana v8.1.5 (c725a42)
- Data source type & version:Zabbix 5.0.15
- OS Grafana is installed on: CentOS Linux release 7.2.1511 (Core)
- User OS & Browser:Google Chrome 94.0.4606.54
- Grafana plugins: zabbix Version 4.2.4
