Cannot connect jenkins agent node "could not locate server among" error

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1

Jenkins setup: Version 2.440.2 / Ubuntu 22.04.3 LTS

I am receiving this error when trying to run my agent.jar file

Mar 30, 2024 6:35:20 PM hudson.remoting.Launcher$CuiListener status
INFO: Locating server among [https://snm-cloud.site:8443/]
Mar 30, 2024 6:35:20 PM hudson.remoting.Launcher$CuiListener status
INFO: Could not locate server among [https://snm-cloud.site:8443/]; waiting 10 seconds before retry

Does anyone know why this error would get thrown?

Could not locate server among

2

I have the same issue on a Windows Server, since this weekend

3

for me it is solved!
Port 58925 was blocked by a Firewall