Problem of install Add-ons

Hello, guys,
Some errors occurred when I tried to install some add-ons, like AnkiConnect. The main errors are: One or more errors occurred: 2055492159(the code of AnkiConncet): Please check your internet connection. Check hostname requires server hostname. After that, I try to some other add-ons, the same result. But I can log in and sync my deck. By the way, I also tried to reinstall Anki and restart my computer, but it seems that not work.

Does anyone know how to fix it? Thanks a lot.

Have you checked your interner connection? I got the same problem today, and it finally worked after I turned off the proxy.