Elastic Security for SIEM Win lab workstation can't connect to Kibana so agent install is not possible

Course: Elastic Security for SIEM
Version: About the lab, I don't know if there are versions
Question:

Hi Everyone,

Have you ever encountered an issue, when the Windows lab machine can't connect to the Kibana external URL? I tried with the agent installing from fleet and also tried to just reach out the Kibana web frontend, but nothing is working.

Is there an option to fully reset the lab environment? It seems like this is a network/FW based issue, therefore it couldn't be resolved on the OS level.

Thank you very much for your help.

I could also attach some logs, but they are shoving the same as I just wrote, so the issue is with the training env and not with the application.