I had this problem today as well. I tried the run as admin fix, then reinstalling Glyph client and deleting AppData. Finally worked when I uninstalled Glyph with all games (Beta and Alpha) then deleted AppData, restarted, turned off my firewall, redownloaded Glyph to C drive, chose to run Glyph as admin, then re-downloaded Alpha game and installed on my C drive in the default location (It was on my D drive before) and it worked finally. Hopefully this helps someone!