Error when I open ASP.NET Maker

Every time I open ASP.NET Maker, I get the following error: “Failed to retrieve information from server: No mapping for the Unicode character exists in the target multi-byte code page.”
See image below.

I also noticed that my extensions are not visible/accessible after this happens.

Has anyone experienced this issue before, and what would be the recommended steps to resolve it?

Cannot simulate. Should be a temporary issue. Please try again.

Are you connected to internet? Or did you use a proxy server for internet connection?

I think Michael was right, When I opened today, not errors and I can see all the extensions. Thank you guys!