How to solve renderer failed when use Grafana image renderer [v 8.3.4]

Grafana Configuration
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install Grafana following from

and try to convert PNG from panel in Dashboard but i got this

Screenshot 2566-03-16 at 10.48.29

custom-config-grafana-1 | logger=rendering renderer=http t=2023-03-16T04:03:14.362247294Z level=error msg=“Failed to send request to remote rendering service” error=“Get \“http://localhost:8081/render?deviceScaleFactor=1.000000&domain=localhost&encoding=&height=500&renderKey=eAVUw8ofFXRoq03ZzV7ZjB99wlohVbCD&timeout=60&timezone=Asia%2FBangkok&url=http%3A%2F%2Flocalhost%3A3000%2Fd-solo%2FVTwajYaVz%2Fhome%3ForgId%3D1%26from%3D1678917792848%26to%3D1678939392848%26panelId%3D123125%26width%3D1000%26height%3D500%26tz%3DAsia%252FBangkok%26render%3D1&width=1000\“: dial tcp 127.0.0.1:8081: connect: connection refused” custom-config-grafana-1 | logger=context userId=1 orgId=1 uname=admin t=2023-03-16T04:03:14.377961211Z level=error msg=“Rendering failed.” error=“failed to send request to remote rendering service: Get \“http://localhost:8081/render?deviceScaleFactor=1.000000&domain=localhost&encoding=&height=500&renderKey=eAVUw8ofFXRoq03ZzV7ZjB99wlohVbCD&timeout=60&timezone=Asia%2FBangkok&url=http%3A%2F%2Flocalhost%3A3000%2Fd-solo%2FVTwajYaVz%2Fhome%3ForgId%3D1%26from%3D1678917792848%26to%3D1678939392848%26panelId%3D123125%26width%3D1000%26height%3D500%26tz%3DAsia%252FBangkok%26render%3D1&width=1000\“: dial tcp 127.0.0.1:8081: connect: connection refused”

Already read from Troubleshooting but still not working…

What should I do