Certificate has expired for asset store

I’m trying to download files using the asset store, but whenever I try to download something, it says “Error invoking remote method ‘local file download’: Error: certificate has expired.” When I try again, sometimes it will work, but I can’t edit the actual sprite (when I open it in piskel it appears blank) and when I look for it in my project files it’s in a file called “assets” and it’s name is a bunch of gibberish that I can’t open. Any suggestions/fixes? Thanks!