Pipeline notification email not being sent

https://sentry.gitlab.net/gitlab/gitlabcom/issues/971413/

Errno::ENOENT: No such file or directory @ rb_sysopen - /var/opt/gitlab/gitlab-ci/builds/2019_10/10035948/326183659.log
  gitlab/ci/trace.rb:85:in `initialize'
    File.open(current_path, "rb")
  gitlab/ci/trace.rb:85:in `open'
    File.open(current_path, "rb")
  gitlab/ci/trace.rb:85:in `block in read'
    File.open(current_path, "rb")
  gitlab/ci/trace/stream.rb:20:in `initialize'
    @stream = yield
  gitlab/ci/trace.rb:79:in `new'
    stream = Gitlab::Ci::Trace::Stream.new do
...
(158 additional frame(s) were not displayed)

ActionView::Template::Error: No such file or directory @ rb_sysopen - /var/opt/gitlab/gitlab-ci/builds/2019_10/10035948/326183659.log

No such file or directory @ rb_sysopen - /var/opt/gitlab/gitlab-ci/builds/2019_10/10035948/326183659.log