404. That’s an error.
The requested URL /crx/download/NgAAAGqwvfs6iNUBnBTdZH7F8uOdhTYtILee-9ntyxbcVGOrDJgmzda-GKBN4B2h9s5-HZ40vFITkz13z_nTBsiOu5UAxlKa5Ue4fy6XXHJ7dR0GUK_s7miAR7tL/extension_1_2_3.crx
was not found on this server. That’s all we know.