Wrong error message shown when setting frequency of new subscription

[connorgurney-personal]

When you try to create a new subscription but don't initially select a topic, the wrong error message is shown on the page to select a frequency after you choose a topic. I think this is because of how Rails handles flash messages.

[connorgurney-personal]

Given that there’s been no interest in this issue for over a year, I’m going to close it. If you decide to triage it in the future, feel free to re-open it.