https://debbugs.gnu.org/cgi/pkgreport.cgi?newest=10

has always shown a list of the latest 10 bugs submitted. Now it just
shows a screen asking for more field input, and says "No reports
found!".

See attached screenshot, with a chrome browser.

In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
 of 2019-08-29
Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
Windowing system distributor `Microsoft Corp.', version 10.0.19045
Configured using:
 `configure --without-dbus --host=x86_64-w64-mingw32
 --without-compress-install 'CFLAGS=-O2 -static -g3''