= phenomenon =
https://copr.fedorainfracloud.org/ leads to HTTP 500, all COPR repositories are not accessible as well.

= reason =
SQL failure:

{{{
Error 500 : Internal Server Error
(psycopg2.ProgrammingError) column copr.unlisted_on_hp does not exist LINE 2: ..., copr.build_enable_net AS copr_build_enable_net, copr.unlis... ^ [SQL: 'SELECT count(*) AS count_1 \nFROM (SELECT copr.id AS copr_id, copr.name AS copr_name, copr.homepage AS copr_homepage, copr.contact AS copr_contact, copr.repos AS copr_repos, copr.created_on AS copr_created_on, copr.description AS copr_description, copr.instructions AS copr_instructions, copr.deleted AS copr_deleted, copr.playground AS copr_playground, copr.auto_createrepo AS copr_auto_createrepo, copr.user_id AS copr_user_id, copr.group_id AS copr_group_id, copr.forked_from_id AS copr_forked_from_id, copr.webhook_secret AS copr_webhook_secret, copr.build_enable_net AS copr_build_enable_net, copr.unlisted_on_hp AS copr_unlisted_on_hp \nFROM copr JOIN "user" ON "user".id = copr.user_id LEFT OUTER JOIN "group" ON "group".id = copr.group_id \nWHERE copr.deleted IS false AND copr.unlisted_on_hp IS false ORDER BY copr.id DESC) AS anon_1']
}}}

= recommendation =
Fixing the issue :)