ArgumentError: invalid byte sequence in UTF-8

https://sentry.gitlab.net/gitlab/gitlabcom/issues/1559593/?referrer=gitlab_plugin

ArgumentError: invalid byte sequence in UTF-8
  rack/utils.rb:599:in `split'
    parts = path_info.split PATH_SEPS
  rack/utils.rb:599:in `clean_path_info'
    parts = path_info.split PATH_SEPS
  rack/cors.rb:155:in `evaluate_path'
    path = Rack::Utils.clean_path_info(Rack::Utils.unescape(path)) if path
  rack/cors.rb:67:in `call'
    path = evaluate_path(env)
  rack/tempfile_reaper.rb:15:in `call'
    status, headers, body = @app.call(env)
...
(50 additional frame(s) were not displayed)

ArgumentError: invalid byte sequence in UTF-8