Grafana image render not working

Hello,
I am having ubuntu 18.04 and grafana 7. I have integrated zabbix 4.0.2 with grafana. everything is working fine except i can not able to include image in my mail notification.When i click on direct link it opens in new tab and displays a white square instead of graph image. i have also enable unsigned plugins. screenshot has been attached with this. Please help me with this guys.

t=2022-06-14T09:24:46+0530 lvl=info msg=“Registering plugin” logger=plugins id=input
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=alexanderzobnin-zabbix-app
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=briangann-gauge-panel
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=grafana-image-renderer
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=grafana-piechart-panel
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=jdbranham-diagram-panel
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=alexanderzobnin-zabbix-datasource
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=alexanderzobnin-zabbix-triggers-panel
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=briangann-datatable-panel
t=2022-06-14T09:24:53+0530 lvl=info msg=“Registering plugin” logger=plugins id=farski-blendstat-panel
t=2022-06-14T09:24:53+0530 lvl=info msg=“Backend rendering via external http server” logger=rendering renderer=http
t=2022-06-14T09:24:53+0530 lvl=info msg=“HTTP Server Listen” logger=http.server address=[::]:3000 protocol=http subUrl= socket=
t=2022-06-14T09:24:53+0530 lvl=info msg=Profiler logger=plugins.backend pluginId=alexanderzobnin-zabbix-datasource enabled=false
t=2022-06-14T09:24:54+0530 lvl=info msg=Rendering logger=rendering renderer=http path=“d-solo/i-SMv61Mz/suratnoc-core?orgId=1&refresh=5s&from=1655092308436&to=1655178708436&panelId=54&width=1000&height=500&tz=Asia%2FColombo”
t=2022-06-14T09:24:54+0530 lvl=dbug msg=“calling remote rendering service” logger=rendering renderer=http url=“http://192.168.1.10:3000/render?deviceScaleFactor=1.000000&domain=localhost&encoding=&height=500&renderKey=fw8WjmcWWa04f0uxPg9gzw0Xvi45LJxy&timeout=60&timezone=Asia%2FColombo&url=http%3A%2F%2Flocalhost%3A3000%2Fd-solo%2Fi-SMv61Mz%2Fsuratnoc-core%3ForgId%3D1%26refresh%3D5s%26from%3D1655092308436%26to%3D1655178708436%26panelId%3D54%26width%3D1000%26height%3D500%26tz%3DAsia%2FColombo%26render%3D1&width=1000
t=2022-06-14T09:24:54+0530 lvl=info msg=“Request Completed” logger=context userId=0 orgId=0 uname= method=GET path=/render status=302 remote_addr=192.168.1.10 time_ms=0 size=29 referer=
t=2022-06-14T09:25:24+0530 lvl=info msg=Rendering logger=rendering renderer=http path=“d-solo/i-SMv61Mz/suratnoc-core?orgId=1&refresh=5s&from=1655092308436&to=1655178708436&panelId=54&width=1000&height=500&tz=Asia%2FColombo”
t=2022-06-14T09:25:24+0530 lvl=dbug msg=“calling remote rendering service” logger=rendering renderer=http url=“http://192.168.1.10:3000/render?deviceScaleFactor=1.000000&domain=localhost&encoding=&height=500&renderKey=cNgCNa5pYeqwJ5UOyb5RgOcCet6xw2Ek&timeout=60&timezone=Asia%2FColombo&url=http%3A%2F%2Flocalhost%3A3000%2Fd-solo%2Fi-SMv61Mz%2Fsuratnoc-core%3ForgId%3D1%26refresh%3D5s%26from%3D1655092308436%26to%3D1655178708436%26panelId%3D54%26width%3D1000%26height%3D500%26tz%3DAsia%2FColombo%26render%3D1&width=1000
t=2022-06-14T09:25:24+0530 lvl=info msg=“Request Completed” logger=context userId=0 orgId=0 uname= method=GET path=/render status=302 remote_addr=192.168.110 time_ms=0 size=29 referer=