Recently I stopped being able to search and install plugins from within the IDE. The lists are completely empty. My proxy settings are working and able to pick up existing plugin updates, IntelliJ updates, etc.
I uninstalled IntelliJ completely and re-installed and it's still the case.
I also tried adding -Djava.net.preferIPv4Stack=true to my idea64.exe.vmoptions.
Anything else I can try?