Trello Integration returns 500 server error after selecting board name

I configured the Trello - Sentry integration for our organization, and everything looked good initially.

From a Sentry issue, I clicked “Create Trello Card,” and as expected was brought to the “Create Trello Card” screen.

However, when I selected the board in which I wanted a card to appear, the required “List” dropdown remained disabled, and the response from the Sentry server was the following:

We are currently unable to submit the Sentry issue to our Trello board.