I'm getting the same issue today (7 June 2022)... it was working fine yesterday. Nothing has changed in terms of network config, java version etc. I've tried from my local Windows machine using Oracle JRE and from a different Ubuntu server using OpenJDK.
I can't even run the getAccounts command eg.
java -jar Reporter.jar p=Reporter.properties Sales.getAccounts
Network is available but cannot connect to application. Check your proxy and firewall settings and try again.
Has anybody managed to solve this?