I am on this version of GNU Emacs on a Windows 10 computer: GNU Emacs 26.3 (build 1, x86_64-w64-mingw32) of 2019-08-29
For the past many weeks, Emacs report this error accessing GNU Elpa when I run "list-packages":
error in process filter: Error retrieving: https://elpa.gnu.org/packages/archive-contents (error http 400) [2 times]
Package refresh done
In a browser, I can access the URI just fine. This happens on two Windows 10 boxes I have.
A Google shows complaints about such errors as recently as a year ago, though I've not found any with "http 400 (Bad Request)". In addition, I don't have errors for melpa stable, the other repository in my package-archives list:
'(package-archives (quote (("gnu" . "https://elpa.gnu.org/packages/") ("melpa-stable" . "https://stable.melpa.org/packages/"))))
Does one of you have suggestions on what else I might try?